Five people A, B, C, D, and E weigh their weights. It is known that the sum of the weights of A and B is the sum of the weights of the other three people (6/11), and the sum of the weights of D and E is the sum of the weights of the other three people. (7/10), C's weight is the sum of D's and E's weights ((())/(())).
A、B、C、D、E五人称体重，已知A、B两人的和是其余三人体重和的(6/11)，D、E两人体重的和是其余三人体重和的(7/10)，C的体重是D、E体重和的((())/(()))．
<gadget id="calculator">6 + 11</gadget>
<output>17</output>

<gadget id="calculator">6 / 17</gadget>
<output>6/17 = around 0.352941</output>

<gadget id="calculator">7 + 10</gadget>
<output>17</output>

<gadget id="calculator">7 / 17</gadget>
<output>7/17 = around 0.411765</output>

<gadget id="calculator">1 - (6/17) - (7/17)</gadget>
<output>4/17 = around 0.235294</output>

<gadget id="calculator">(4/17) / (7/17)</gadget>
<output>4/7 = around 0.571429</output>

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