Why is this not working

Question

The calculator I made in C is not working
https://code.sololearn.com/cy9nJXso1J4a/?ref=app

Answer 1

In Sololearn, all input is taken at once.
Therefore, when the dialog appears, you give your output like this:
===================
(operator)
(number1) (number2)
===================
Otherwise your code runs fine.

Answer 2

U should enter the operator before the two numbers like this
*
4.0
6.0

Answer 3

Thank you