Calculation: (2/(1*7))+(2/(7*13))+(2/(13*19))+…+(2/(145*151)).
计算：(2/(1*7))+(2/(7*13))+(2/(13*19))+…+(2/(145*151))．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 151</gadget>
<output>1/151 = around 0.006623</output>

<gadget id="calculator">1 - (1/151)</gadget>
<output>150/151 = around 0.993377</output>

<gadget id="calculator">(1/3) * (150/151)</gadget>
<output>50/151 = around 0.331126</output>

<result>50/151 = around 0.331126</result>