Calculation: (1+(1/2))*(1-(1/2))*(1+(1/3))*(1-(1/3))*…*(1+(1/2) 99))*(1-(1/99))
计算：(1+(1/2))*(1-(1/2))*(1+(1/3))*(1-(1/3))*…*(1+(1/99))*(1-(1/99))
<gadget id="calculator">2 * 99</gadget>
<output>198</output>

<gadget id="calculator">100 / 198</gadget>
<output>50/99 = around 0.505051</output>

<result>50/99 = around 0.505051</result>