Each box contains 6 balls, and there are 30 white balls and 18 red balls. How many more boxes are there in white ball boxes than red ball boxes?
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))