func main()
	var a: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	var c: int :: cui@inputInt()
	var d: int :: cui@inputInt()
	var ans: int :: a
	do ans :* b
	do ans :% d
	do ans :* c
	do ans :% d
	do cui@print("\{ans}\n")
end func