Divide a 5m long iron wire into 7 sections on average, how many meters is the length of each section of iron wire, it is 5m ((())/(())), and it is also 1m ((())/(())).
把一根5m长的铁丝平均分成7段，每段铁丝长多少m，它是5m的((())/(()))，也是1m的((())/(()))．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / (1/7) / 1</gadget>
<output>7</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>