Multiplying 12 plus 3 by 12 minus A gives 120. Find A.
12 120 12 3 [OP_ADD] [OP_DIV] [OP_SUB]
var_a = 12
var_b = 120
var_c = 12
var_d = 3
var_e = var_c + var_d
var_f = var_b / var_e
var_g = var_a - var_f
print(int(var_g))