(1/12)+(1/20)+(1/30)+(1/42)+(1/56)+(1/8).
(1/12)+(1/20)+(1/30)+(1/42)+(1/56)+(1/8)．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 42</gadget>
<output>1/42 = around 0.02381</output>

<gadget id="calculator">1 / 56</gadget>
<output>1/56 = around 0.017857</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/12) + (1/20) + (1/30) + (1/42) + (1/56) + (1/8)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>