A particular number should have been multiplied by 40, but when I accidentally subtracted 21 from that number, the result was 52. Find the correct calculation result.
52 21 [OP_ADD] 40 [OP_MUL]
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))