You mistakenly added 21 to a particular number when you were supposed to add 40, and the result was 52. Find out the answer when correctly calculated.
52 21 [OP_SUB] 40 [OP_ADD]
var_a = 52
var_b = 21
var_c = var_a - var_b
var_d = 40
var_e = var_c + var_d
print(int(var_e))