Just add all the sides its really easy i would have done it but i cant see the squares that are on the paper or pc idk
Hope that helped!
if it didnt help just let me know and ill hlp you even more !
The answer to the problem is -5
As shown in the question, the translation changes the points as follows:

Therefore:
0.4x10^-3
Adding random characters here.
The largest number is 345