To decorate a living room, it takes 500 pieces to pave the floor with 2 mm square bricks. How much does it take to pave the floor with 4 DM square bricks

To decorate a living room, it takes 500 pieces to pave the floor with 2 mm square bricks. How much does it take to pave the floor with 4 DM square bricks

Let x block be 2x2:4x4 = x: 500