Draw a rectangular playground on the drawing with a scale of 1:100. The area on the drawing is the actual area ((())/(())).
把一个长方形操场用1：100的比例尺画在图纸上，图上的面积是实际面积的((())/(()))．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">8 / (1/100)</gadget>
<output>800</output>

<gadget id="calculator">4 / (1/100)</gadget>
<output>400</output>

<gadget id="calculator">800 * 400</gadget>
<output>320_000</output>

<gadget id="calculator">32 / 320_000</gadget>
<output>1/10_000 = around 0.0001</output>

<result>1/10_000 = around 0.0001</result>