Cut the 5-meter-long rope into 7 sections on average. The fifth section accounts for ((())/(())) of the total length. How many meters is it?
把5米长的绳子平均截成7段，第五段占全长的((())/(()))，长多少米．
<gadget id="calculator">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>