Subtract (1/2) of 2013, then subtract the rest (1/3), then subtract the rest (1/4), ... and finally subtract the rest (1/2013), and finally How much do you want?
2013减去它的(1/2)，再减去剩下的(1/3)，再减去剩下的(1/4)，…最后减去剩下的(1/2013)，最后剩下多少？
<gadget id="calculator">1 / 2_013</gadget>
<output>1/2_013 = around 0.000497</output>

<gadget id="calculator">2_013 * (1/2_013)</gadget>
<output>1</output>

<result>1</result>