When you mistakenly add 30 which should have been multiplied to by number, you get 86. Find out how much it is if you calculate it correctly.
86 30 [OP_SUB] 30 [OP_MUL]
var_a = 86
var_b = 30
var_c = var_a - var_b
var_d = 30
var_e = var_c * var_d
print(int(var_e))