When 4 friends shake hands with each other once, how many handshakes are made in total?
3 3 1 [OP_SUB] [OP_MUL] 2 [OP_DIV]
var_a = 3
var_b = 3
var_c = 1
var_d = var_b - var_c
var_e = var_a * var_d
var_f = 2
var_g = var_e / var_f
print(int(var_g))