If S=(1/((1/1995)+(1/1996)+(1/1997)+(1/1998)+(1/1999))), what is the integer part of S?
若S=(1/((1/1995)+(1/1996)+(1/1997)+(1/1998)+(1/1999)))，则S的整数部分是多少．
<gadget id="calculator">1 / 399</gadget>
<output>1/399 = around 0.002506</output>

<gadget id="calculator">1 / (1/399)</gadget>
<output>399</output>

<result>399</result>