Calculation: 5/((2/3)+(1/5))*(1/13).
计算：5/((2/3)+(1/5))*(1/13)．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) + (1/5)</gadget>
<output>13/15 = around 0.866667</output>

<gadget id="calculator">5 / (13/15)</gadget>
<output>75/13 = around 5.769231</output>

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

<gadget id="calculator">(75/13) * (1/13)</gadget>
<output>75/169 = around 0.443787</output>

<result>75/169 = around 0.443787</result>