(1/(2*7))+(1/(7*12))+(1/(12*17))+(1/(17*22))+…+(1/(92*97) )+(1/(97*102))=How much.
(1/(2*7))+(1/(7*12))+(1/(12*17))+(1/(17*22))+…+(1/(92*97))+(1/(97*102))=多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 102</gadget>
<output>1/102 = around 0.009804</output>

<gadget id="calculator">(1/2) - (1/102)</gadget>
<output>25/51 = around 0.490196</output>

<gadget id="calculator">(1/5) * (25/51)</gadget>
<output>5/51 = around 0.098039</output>

<result>5/51 = around 0.098039</result>