Calculation: (1/(2*5))+(1/(5*8))+(1/(8*11))+…+(1/(2012*2015)).
计算：(1/(2*5))+(1/(5*8))+(1/(8*11))+…+(1/(2012*2015))．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">1 / 2_015</gadget>
<output>1/2_015 = around 0.000496</output>

<gadget id="calculator">(1/2) - (1/2_015)</gadget>
<output>2_013/4_030 = around 0.499504</output>

<gadget id="calculator">(1/3) * (2_013/4_030)</gadget>
<output>671/4_030 = around 0.166501</output>

<result>671/4_030 = around 0.166501</result>