Xiaohong needs 480 square tiles with a side length of 0.3 meters to lay the ground. If she uses tiles with a side length of 0.4 meters, how many tiles will she need?
小红家用边长为0.3米的正方形瓷砖铺设地面，需要480块，如果改用边长0.4米的瓷砖铺设，需要多少块？
<gadget id="calculator">0.4 * 0.4</gadget>
<output>0.16</output>

<gadget id="calculator">480 / 0.16</gadget>
<output>3_000</output>

<gadget id="calculator">0.3 * 0.3 * 3_000</gadget>
<output>270</output>

<result>270</result>