Calculation: (1/3)+(1/6)+(1/10)+(1/15)+(1/21)+(1/28)+(1/36)+(1/45)= How many.
计算：(1/3)+(1/6)+(1/10)+(1/15)+(1/21)+(1/28)+(1/36)+(1/45)=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 21</gadget>
<output>1/21 = around 0.047619</output>

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

<gadget id="calculator">1 / 36</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">1 / 45</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">(1/3) + (1/6) + (1/10) + (1/15) + (1/21) + (1/28) + (1/36) + (1/45)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>