Seonwoo's school's 3rd graders have 4 classes with 21 students in each class. All 3rd graders are trying to plant 2 seeds in their pots. How many seeds do they need in all?
21 4 [OP_MUL] 2 [OP_MUL]
var_a = 21
var_b = 4
var_c = var_a * var_b
var_d = 2
var_e = var_c * var_d
print(int(var_e))