You need to add 45 to a number, but mistakenly added 54, and got 78. Find the result of the correct calculation.
78 54 [OP_SUB] 45 [OP_ADD]
var_a = 78
var_b = 54
var_c = var_a - var_b
var_d = 45
var_e = var_c + var_d
print(int(var_e))