It takes 500 pieces to use 15cm square bricks to pave the floor of a room. If we use 30cm square bricks to pave the floor, how many pieces?

It takes 500 pieces to use 15cm square bricks to pave the floor of a room. If we use 30cm square bricks to pave the floor, how many pieces?

One hundred and twenty-five times the length of the side, four times the area