Read the following stack trace:
Exception in thread "main" java.lang.ArithmeticException: / by zero
at test.TestKt.division2(test.kt:4)
at test.TestKt.division1(test.kt:9)
at test.TestKt.main(test.kt:16)
at test.TestKt.main(test.kt)
Write the number of the line where exceptions occur.