Divide a rope into 7 equal parts. 3 of them are its ((())/(())).
把一根绳子平均分成7份．其中的3份是它的((())/(()))．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) * 3</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>