Divide a 3-meter-long rope into 7 sections on average. What is the length of each section in meters, and each section occupies ((())/(())) of the rope.
把一根长3米的绳子平均分成7段，每份的长度是多少米，每份占这根绳子的((())/(()))．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">3 * (1/7)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>