There are candy bags with 30 candies in each bag. If you put all 254 candies in and there is no space left in all the bags, find out how many more candies you need to buy.
30 254 30 [OP_MOD] [OP_SUB]
var_a = 30
var_b = 254
var_c = 30
var_d = var_b % var_c
var_e = var_a - var_d
print(int(var_e))