A flagpole is 12 meters long, of which the length buried in the soil is 1.5 meters, and the part exposed to the ground is the full length ((())/(())).
一根旗杆长12米，其中埋入土中的长度是1.5米，露出地面的部分是全长的((())/(()))．
<gadget id="calculator">12 - 1.5</gadget>
<output>10.5</output>

<gadget id="calculator">10.5 / 12</gadget>
<output>0.875</output>

<result>0.875</result>