Calculation: ((2/11)+(1/13))*11*13=how much.
计算：((2/11)+(1/13))*11*13=多少．
<gadget id="calculator">2 / 11</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">1 / 13</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">(2/11) + (1/13)</gadget>
<output>37/143 = around 0.258741</output>

<gadget id="calculator">(37/143) * 11 * 13</gadget>
<output>37</output>

<result>37</result>