How to verify text A*B = C

hi.
in katalon studio, i want to check A*B is C.
(A,B,C is get text)
What keywords should I use?

if statement ? verify equal? verify match?

You should be able to use either of them:

WebUI.verifyEqual(actualObject, expectedObject)
WebUI.verifyMatch(actualObject, expectedObject, false)

You will have to remove the comma from the String text before you do your calculation though. That is likely the NumberFormatException you are getting.

// as a String
actualObject = actualObject.replace(",", "")

// as a Double or Number
WebUI.verifyEqual(nActualObject, nExpectedObject)
WebUI.verifyMatch(nActualObject, nExpectedObject, false)

Edit:
Just a note that with verifyEqual, it expects both parameters to be Objects. We had a discussion on this forum when comparing two Strings, which are Objects, that verifyEqual would fail the comparison if the Strings were declared as:
String actualObject

but would pass if the Strings were declared as:
def actualObject

So do the comparison with both of the parameters as Objects, like Double.

You should read the message carefully. Mind that you got an error

java.lang.NumberFormatException: For input string: "1,000.00000000"

To reproduce your problem, I wrote a Test Case:

String a = '1,000.00000000'
String b = '2.71828'
Double c = a.toDouble() * b.toDouble()
print(c)

When I run this, I got the following error:

2022-08-27 07:07:54.397 ERROR c.k.katalon.core.main.TestCaseExecutor   - ❌ Test Cases/kwang2 FAILED.
Reason:
java.lang.NumberFormatException: For input string: "1,000.00000000"
	at kwang2.run(kwang2:3)
	at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
	at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
	at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:445)
	at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:436)
	at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:415)
	at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:407)
	at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:284)
	at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:142)
	at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:133)
	at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)
	at TempTestCase1661551670729.run(TempTestCase1661551670729.groovy:25)

2022-08-27 07:07:54.418 ERROR c.k.katalon.core.main.TestCaseExecutor   - ❌ Test Cases/kwang2 FAILED.
Reason:
java.lang.NumberFormatException: For input string: "1,000.00000000"
	at kwang2.run(kwang2:3)
	at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
	at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
	at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:445)
	at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:436)
	at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:415)
	at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:407)
	at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:284)
	at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:142)
	at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:133)
	at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)
	at TempTestCase1661551670729.run(TempTestCase1661551670729.groovy:25)

The input string 1,000.00000000 contains a comma character , which causes a NumberFormatException when you carelessly call a.toDouble().

To use verify equal or verify match? That is not the question you should ask.

How to parse a string with a comma character into a Double? The following code is an example.

import java.text.NumberFormat

NumberFormat format = NumberFormat.getInstance(Locale.US);

String a = '1,000.00000000'
String b = '2.71828'

Number number_a = format.parse(a)
Number number_b = format.parse(b)
Double c = number_a.doubleValue() * number_b.doubleValue()
println("c is " + c.toString())

There could be many other ways.

is there a way to codeless in katalon?

No. You need to study Java/Groovy programming to solve this problem. If you stay a Manual mode user, you can not solve it.

Thanks a lot