There were 52 kilograms (kg) of rice. I ate 9 kilograms (kg) each day for 3 days. How many kilograms (kg) of rice are left?
52 3 9 [OP_MUL] [OP_SUB]
var_a = 52
var_b = 3
var_c = 9
var_d = var_b * var_c
var_e = var_a - var_d
print(int(var_e))