You are in a room with a saw and piece of wood how do you get out?

You are supposed to saw the wood in half. Two halves make a whole. You jump through the "hole" and you're out.

In elementary, there was a similar one, but it was with a mirror and a table. You look in the mirror you see what you saw. You take the saw. Then you saw the table in half. Two halves make a whole. You jump through the hole and you're out.