How many square bricks are needed to pave 76.8 square meters of ground with square bricks with a side length of 0.8 meters?
用边长0.8米的方砖铺76.8平方米的地面，需要多少块这样的方砖？
<gadget id="calculator">0.8 * 0.8</gadget>
<output>0.64</output>

<gadget id="calculator">76.8 / 0.64</gadget>
<output>120</output>

<result>120</result>