Calculation: (3/4)+(3/28)+(3/70)+(3/130).
计算：(3/4)+(3/28)+(3/70)+(3/130)．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 / 28</gadget>
<output>3/28 = around 0.107143</output>

<gadget id="calculator">3 / 70</gadget>
<output>3/70 = around 0.042857</output>

<gadget id="calculator">3 / 130</gadget>
<output>3/130 = around 0.023077</output>

<gadget id="calculator">(3/4) + (3/28) + (3/70) + (3/130)</gadget>
<output>12/13 = around 0.923077</output>

<result>12/13 = around 0.923077</result>