Subtract (1/2) of 1997, then subtract the remaining (1/3), then subtract the remaining (1/4), ..., and finally subtract the remaining (1/1997), ask What is the last remaining number?
1997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(1/1997)，问最后剩下的数是几？
<gadget id="calculator">1 / 1_997</gadget>
<output>1/1_997 = around 0.000501</output>

<gadget id="calculator">1_997 * (1/1_997)</gadget>
<output>1</output>

<result>1</result>