The area of a classroom is 86.4 square meters, and the floor is paved with square tiles with a side length of 0.4 meters. How many tiles are needed in total?
一间教室的面积是86.4平方米，用边长0.4米的正方形瓷砖铺地，共需这种瓷砖多少块？
<gadget id="calculator">86.4 / 0.16</gadget>
<output>540</output>

<result>540</result>