The length of a classroom is 9 meters, the width is 7 meters, and the floor is paved with tiles with a side length of 0.6 meters. How many tiles are needed in total?
一间教室的长是9米，宽是7米，用边长0.6米的瓦砖铺地面，共要多少块瓦砖？
<gadget id="calculator">9 * 7</gadget>
<output>63</output>

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

<gadget id="calculator">63 / 0.36</gadget>
<output>175</output>

<result>175</result>