There was a mistake in calculation that you divided 63 by a certain number instead of subtracting a certain number from 36. If you got the wrong answer 9, how much is it if you calculate it correctly?
36 63 9 [OP_DIV] [OP_SUB]
var_a = 36
var_b = 63
var_c = 9
var_d = var_b / var_c
var_e = var_a - var_d
print(int(var_e))