What is the sum of all the proper fractions whose denominator is 101?
分母为101的所有真分数之和等于多少．
<gadget id="calculator">1 + 100</gadget>
<output>101</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">101 * 50</gadget>
<output>5_050</output>

<gadget id="calculator">5_050 / 101</gadget>
<output>50</output>

<result>50</result>