Calculation: (251/(4*8))+(251/(8*12))+(251/(12*16))+…+(251/(2000*2004))+(251/(2004* 2008)).
计算：(251/(4*8))+(251/(8*12))+(251/(12*16))+…+(251/(2000*2004))+(251/(2004*2008))．
<gadget id="calculator">251 / 4</gadget>
<output>251/4 = around 62.75</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 2_008</gadget>
<output>1/2_008 = around 0.000498</output>

<gadget id="calculator">(1/4) - (1/2_008)</gadget>
<output>501/2_008 = around 0.249502</output>

<gadget id="calculator">(251/4) * (501/2_008)</gadget>
<output>501/32 = around 15.65625</output>

<result>501/32 = around 15.65625</result>