Calculation: (1/(1*2*3))+(1/(2*3*4))+(1/(3*4*5))+…+(1/(8*9*10) ).
计算：(1/(1*2*3))+(1/(2*3*4))+(1/(3*4*5))+…+(1/(8*9*10))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 - (1/2) - (1/9)</gadget>
<output>7/18 = around 0.388889</output>

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

<gadget id="calculator">(7/18) + (1/10)</gadget>
<output>22/45 = around 0.488889</output>

<gadget id="calculator">(1/2) * (22/45)</gadget>
<output>11/45 = around 0.244444</output>

<result>11/45 = around 0.244444</result>