(1/(6*7))+(1/(7*8))+(1/(8*9))+…+(1/(100*101))=how much.
(1/(6*7))+(1/(7*8))+(1/(8*9))+…+(1/(100*101))=多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 101</gadget>
<output>1/101 = around 0.009901</output>

<gadget id="calculator">(1/6) - (1/101)</gadget>
<output>95/606 = around 0.156766</output>

<result>95/606 = around 0.156766</result>