push a
push 5
use =(2)
push a
push a
push 1
use +(2)
use =(2)
push a
push a
push 2
use -(2)
use =(2)
push a
push a
push 3
use *(2)
use =(2)
push a
push a
push 6
use /(2)
use =(2)
push a
use print(1)