Divide a 5-meter-long steel bar into how many parts on average, and each part is its (1/4).
把一根5米长的钢筋平均分成多少份，每一份是它的(1/4)．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<result>4</result>