Subtract (1/2) of it from 1988, then subtract the rest (1/3), then subtract the rest (1/4), ... finally subtract the rest (1/1988), the result is How many.
1988减去它的(1/2)，再减去剩下的(1/3)，又减去剩下的(1/4)，…最后减去剩下的(1/1988)，结果是多少．
<gadget id="calculator">1 / 1_988</gadget>
<output>1/1_988 = around 0.000503</output>

<result>1/1_988 = around 0.000503</result>