Divide a circle with an area of 5 square decimeters into 5 equal parts, how much is each part
把一个面积是5平方分米的圆平均分成5份，每份是它的多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>