With square bricks with an area of 9 square decimeters, 480 pieces are just paved. If square bricks with a side length of 4 decimeters are used, how many pieces are needed?
用面积为9平方分米的方砖，480块正好铺满，如果用边长为4分米的方砖，需要多少块？
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

<gadget id="calculator">480 * (9/16)</gadget>
<output>270</output>

<result>270</result>