Why is this bringing an error only when you calculate the area

Question

https://code.sololearn.com/cY8IuqU6YxZH/?ref=app

Answer 1

Thanks Slick

Answer 2

change the inputs to int
they default as strings

EDIT: No problem at all Hamisa
https://code.sololearn.com/cg2oXdaJ9NC5/?ref=app

Answer 3

Lol