(IG)(CE)
Sam has sheets of green and yellow plastic that he wants to use to make a square chequerboard pattern on a coffee-table top.Each sheet measures 210cm by 154 cm.The squares are to be the maximum size possible.What will be the length of the side of each square and how many willhe be able to cut from each sheet?

 山姆有几张绿色和黄色的塑料板，他想用这些塑料板在咖啡桌桌面上制作一个方格棋盘图案。每张塑料板的尺寸为210厘米×154厘米。每个方格的尺寸应尽可能大。每个方格的边长是多少？他能从每张塑料板上裁出多少个方格？