Calculation: (1/(1*4))+(1/(4*7))+(1/(7*10))+(1/(10*13))+…+(1/(298* 301)) = how much.
计算：(1/(1*4))+(1/(4*7))+(1/(7*10))+(1/(10*13))+…+(1/(298*301))=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 301</gadget>
<output>1/301 = around 0.003322</output>

<gadget id="calculator">1 - (1/301)</gadget>
<output>300/301 = around 0.996678</output>

<gadget id="calculator">(1/3) * (300/301)</gadget>
<output>100/301 = around 0.332226</output>

<result>100/301 = around 0.332226</result>