254 students are going to be assigned to several buses. If there are 30 people on each bus and there are no seats left, how many more students are needed?
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))