There is a classroom with a length of 8 meters and a width of 3.2 meters. How many square bricks with an area of 0.64 square meters are needed at least?
有一个教室，长8米，宽3.2米．用面积是0.64平方米的方砖铺地，至少需要多少块？
<gadget id="calculator">3.2 / 0.64</gadget>
<output>5</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>