Divide the 4-meter-long iron wire into 5 sections on average, how long is each section in meters, and each section is the broken iron wire ((())/(())).
把4米长的铁丝平均分成5段，每段长多少米，每段是这断铁丝的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5)</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>