You are told to divide 30 white balls and 18 red balls into boxes by the color. There are 6 balls in each box. How many more boxes of white balls would there be than boxes of red balls? 
30 6 [OP_DIV] 18 6 [OP_DIV] [OP_SUB]
var_a = 30
var_b = 6
var_c = var_a / var_b
var_d = 18
var_e = 6
var_f = var_d / var_e
var_g = var_c - var_f
print(int(var_g))