Calculation: (1/6)+(1/7)+(1/5)=how much.
计算：(1/6)+(1/7)+(1/5)=多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/6) + (1/7) + (1/5)</gadget>
<output>107/210 = around 0.509524</output>

<result>107/210 = around 0.509524</result>