It takes 240 pieces to pave the floor of a room with floor tiles with a side length of 3dm. If you use floor tiles with a side length of 4dm, how many pieces are needed? (Solve with ratio)
用边长为3dm的地砖铺一间房的地面，需要240块，如果改用边长为4dm的地砖，需要多少块？(用比例解)
<gadget id="calculator">3 * 3 * 240</gadget>
<output>2_160</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">2_160 / 16</gadget>
<output>135</output>

<result>135</result>