A=(1/287)*(((1/7))+((2/7))+((3/7))+…+(((k)/7))+…+((2009 /7))+((2010/7)))=how much.
A=(1/287)*(((1/7))+((2/7))+((3/7))+…+(((k)/7))+…+((2009/7))+((2010/7)))=多少．
<gadget id="calculator">1 / 287</gadget>
<output>1/287 = around 0.003484</output>

<gadget id="calculator">1 + 286</gadget>
<output>287</output>

<gadget id="calculator">286 / 2</gadget>
<output>143</output>

<gadget id="calculator">287 * 143 * 7</gadget>
<output>287_287</output>

<gadget id="calculator">287 * 2</gadget>
<output>574</output>

<gadget id="calculator">287_287 + 574</gadget>
<output>287_861</output>

<gadget id="calculator">(1/287) * 287_861</gadget>
<output>1_003</output>

<result>1_003</result>