I want to subtract this number from 20. I mistakenly added this number to 40, and the result was 52. What is the result of the correct calculation?
20 52 40 [OP_SUB] [OP_SUB]
var_a = 20
var_b = 52
var_c = 40
var_d = var_b - var_c
var_e = var_a - var_d
print(int(var_e))