Answer 1

how do you want to use them in the if statement? one by one? make another number with them ?

to get the first three digits of a number l_numb in another number fist_d, you can use :

first_d = int(str(l_numb)[:3])

you might then use that number in your if statement.

if you want them one by one, just iterate through str(l_numb)[:3]