The master worker paved the floor with square bricks. Using square bricks with an area of 9 square decimeters, 240 square bricks are exactly covered; if you use square bricks with a side length of 4 decimeters, how many pieces are needed?
工人师傅用方砖铺地．用面积9平方分米的方砖，240块正好铺满；如果改用边长是4分米的方砖，需要多少块？
<gadget id="calculator">240 * 9</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>