For a room, it takes 240 pieces to pave the floor with square bricks with a side length of 3 decimeters. If the floor is replaced with square bricks with a side length of 4 decimeters, how many pieces are needed? (Solve with ratio)
一个房间，用边长为3分米的方砖铺地需240块，如果改用边长为4分米的方砖铺地，需多少块？(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>