(1/(1*2*3*4))+(1/(2*3*4*5))+(1/(3*4*5*6))+…+(1/(97* 98*99*100))=how much.
(1/(1*2*3*4))+(1/(2*3*4*5))+(1/(3*4*5*6))+…+(1/(97*98*99*100))=多少．
<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

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

<gadget id="calculator">98 * 99 * 100</gadget>
<output>970_200</output>

<gadget id="calculator">1 / 970_200</gadget>
<output>1/970_200 = around 0.000001</output>

<gadget id="calculator">(1/6) - (1/970_200)</gadget>
<output>161_699/970_200 = around 0.166666</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(161_699/970_200) * (1/3)</gadget>
<output>161_699/2_910_600 = around 0.055555</output>

<result>161_699/2_910_600 = around 0.055555</result>