Test case 3 not satisfied

#1

sir/ maam ,
can you please tell which of the case is not satisfied , as it is showing only case 3 . So please tell me the details about case 3

#2

Hey @1999atrijsharma
try for this input

6
2
?
6
*
2
6
?
x
correct output :
4
Invalid operation. Try again.
Invalid operation. Try again.
12
Invalid operation. Try again.
your code gives :
4
Invalid operation. Try again.
12
Invalid operation. Try again.