1-(1/4)-(1/28)-(1/70)-(1/130)-(1/208)=how much.
1-(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 - (1/4) - (1/28) - (1/70) - (1/130) - (1/208)</gadget>
<output>11/16 = around 0.6875</output>

<result>11/16 = around 0.6875</result>