 All right, exchange your square inch tiles. I'm going to make a quick change. I'm going to ask you to take out your personal white, the whiteboard, the laminated one. Okay? Yes, it should be erased. Okay? And I'm going to ask you to draw a rectangle on the centimeter side, on the centimeter side, that's four rows of five rectangles. Four rows of five rectangles. Draw a rectangle that is four rows of five rectangles. Just go ahead and draw over it. Four rows of five rectangles. Go ahead and label that for me. What is the side length and the top length? Four rows of five rectangles. What are you supposed to have? Four rows of five rectangles. Other side, Luca. Luca, turn it over, other side. Four rows of five rectangles. Can you label it for me? Each side, huh? How long is this side? How long is this side? I want you to label each side. What side of the paper are you on? The centimeter side, right? So make sure you're using centimeters on your ruler. Okay? Make sure you're using centimeters on your ruler.