Find the difference between the number of diagonals in the octagon and the number of diagonals in the heptagon.
8 8 3 [OP_SUB] [OP_MUL] 2 [OP_DIV] 7 7 3 [OP_SUB] [OP_MUL] 2 [OP_DIV] [OP_SUB]
var_a = 8
var_b = 8
var_c = 3
var_d = var_b - var_c
var_e = var_a * var_d
var_f = 2
var_g = var_e / var_f
var_h = 7
var_i = 7
var_j = 3
var_k = var_i - var_j
var_l = var_h * var_k
var_m = 2
var_n = var_l / var_m
var_o = var_g - var_n
print(int(var_o))