What is the quotient of the difference between 7 and its reciprocal divided by (3/7) and the sum of its reciprocal?
7与它的倒数的差除(3/7)与它的倒数的和，商多少？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 / (3/7)</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">(3/7) + (7/3)</gadget>
<output>58/21 = around 2.761905</output>

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

<gadget id="calculator">7 - (1/7)</gadget>
<output>48/7 = around 6.857143</output>

<gadget id="calculator">(58/21) / (48/7)</gadget>
<output>29/72 = around 0.402778</output>

<result>29/72 = around 0.402778</result>