A section of steel pipe is (1/5) meter long, and is cut into 7 sections on average.
一段钢管长(1/5)米，平均剪成7段，每段长多少米，每段长占这段钢管的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) * (1/7)</gadget>
<output>1/35 = around 0.028571</output>

<result>1/35 = around 0.028571</result>