Why is this code giving an error message

Question

Please help me!!
https://code.sololearn.com/crI46gES0jHF/?ref=app

Why this code is giving error message.
I checked it out many times.

Answer 1

Code works if special input() requirements for playground is noted.

Answer 2

B!P!N R@j I think Input is giving you trouble, input like this:
5.6 + enter
7.7 + enter
'+' submit
Try the above and let me know

#insert your code by clicking on insert while posting a new question although you can correct this one by editing