Calculation: (1/(1+2))+(1/(1+2+3))+(1/(1+2+3+4))+…+(1/(1+2+3+ ...+99)).
计算：(1/(1+2))+(1/(1+2+3))+(1/(1+2+3+4))+…+(1/(1+2+3+…+99))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/2) - (1/100)</gadget>
<output>49/100 = around 0.49</output>

<gadget id="calculator">2 * (49/100)</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>