Uncle Wang’s house plans to pave a room with a length of 9 meters and a width of 5 meters with floor tiles. It needs 16 floor tiles per square meter. How many floor tiles will Uncle Wang buy in total?
王叔叔家准备把一间长9米宽5米的房间铺上地砖，每平方米需要16块地砖，王叔叔一共要买多少块地砖？
<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<gadget id="calculator">45 * 16</gadget>
<output>720</output>

<result>720</result>