(1/4)+(1/28)+(1/70)+(1/130)+(1/208)=how much.
(1/4)+(1/28)+(1/70)+(1/130)+(1/208)=多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 28</gadget>
<output>1/28 = around 0.035714</output>

<gadget id="calculator">1 / 70</gadget>
<output>1/70 = around 0.014286</output>

<gadget id="calculator">1 / 130</gadget>
<output>1/130 = around 0.007692</output>

<gadget id="calculator">1 / 208</gadget>
<output>1/208 = around 0.004808</output>

<gadget id="calculator">(1/4) + (1/28) + (1/70) + (1/130) + (1/208)</gadget>
<output>5/16 = around 0.3125</output>

<result>5/16 = around 0.3125</result>