A music teacher needs to use square bricks to pave the floor. If the square floor tiles with a side length of 0.4 meters are used, a total of 270 pieces are needed. If the square floor tiles with a side length of 0.6 meters are used, how many pieces are needed at least?
一间音乐教师要用方砖铺地，如果用边长0.4米的正方形地砖，一共需要270块，如果改用边长0.6米的正方形地砖，至少需要多少块？
<gadget id="calculator">0.4 * 0.4 * 270</gadget>
<output>43.2</output>

<gadget id="calculator">0.6 * 0.6</gadget>
<output>0.36</output>

<gadget id="calculator">43.2 / 0.36</gadget>
<output>120</output>

<result>120</result>