Xiaowei’s house is going to use floor tiles to pave the floor, and it needs 72 square floor tiles with a side length of 5dm. If the square floor tiles with a side length of 3dm are used instead, how many floor tiles are needed? (Solve with ratio)
小伟家准备用地板砖铺地，用边长为5dm的正方形地板砖需72块，如果改用边长为3dm的正方形的地板砖，需要多少块地板砖？(用比例解)
<gadget id="calculator">5 * 5 * 72</gadget>
<output>1_800</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">1_800 / 9</gadget>
<output>200</output>

<result>200</result>