Calculation: (2/(2*5))+(2/(5*8))+(2/(8*11))+…+(2/(1997*2000))+(2/(2000* 2003)).
计算：(2/(2*5))+(2/(5*8))+(2/(8*11))+…+(2/(1997*2000))+(2/(2000*2003))．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">1 / 2_003</gadget>
<output>1/2_003 = around 0.000499</output>

<gadget id="calculator">(1/2) - (1/2_003)</gadget>
<output>2_001/4_006 = around 0.499501</output>

<gadget id="calculator">(2/3) * (2_001/4_006)</gadget>
<output>667/2_003 = around 0.333</output>

<result>667/2_003 = around 0.333</result>