If you draw a diagonal from one vertex of a figure made of 9 angles, how many figures made of 3 angles are made?
9 3 [OP_SUB] 1 [OP_ADD]
var_a = 9
var_b = 3
var_c = var_a - var_b
var_d = 1
var_e = var_c + var_d
print(int(var_e))