Cut a 4-meter-long iron wire into 8 equal sections, what is the average time spent for each section in the total time
把4米长的铁丝截成相等的8段，平均每截一段所用的时间占总时间的多少
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>