I was trying to do the follow calculation in python 3:
https://i.sstatic.net/f5y7z.png
add with:
https://i.sstatic.net/Txoya.png
that should return 0 (images were made in wolframalpha).
When I try to do the same calculation in python:
pow((2*3*5),28)-29*math.floor(pow((2*3*5),28)/29)-1
it returns 4303955653455607115022335.
the value of each part is:
228767924549610000000000000000000000000000 correct.
-228767924549609995696044346544392884977665 incorrect.
How can I fix this?
You are using floating point division / which has a limited precision, so your large result gets rounded.
Instead, you can get what you want with integer, floor division //, which has an integer result with unlimited precision:
import math
pow((2*3*5),28)-29*(pow((2*3*5),28)//29)-1
# 0