This year, the age difference between Minsu and his mother is 28 years old, and after 13 years, the age of his mother will be twice that of Minsu. Find the age of Minsu this year.
13 28 13 [OP_SUB] 2 [OP_MUL] [OP_ADD] 2 1 [OP_SUB] [OP_DIV] 28 [OP_SUB]
var_a = 13
var_b = 28
var_c = 13
var_d = var_b - var_c
var_e = 2
var_f = var_d * var_e
var_g = var_a + var_f
var_h = 2
var_i = 1
var_j = var_h - var_i
var_k = var_g / var_j
var_l = 28
var_m = var_k - var_l
print(int(var_m))