Saw a 4-meter-long steel pipe into 7 sections on average, how many meters is each section, and each section accounts for ((())/(())) of the total length.
把4米长的钢管平均锯成7段，每段长多少米，每段占全长的((())/(()))．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>