Calculation: (1+(1/2))*(1+(1/3))*(1+(1/4))*…*(1+(1/18))*(1+(1/3) 19))*(1+(1/20))
计算：(1+(1/2))*(1+(1/3))*(1+(1/4))*…*(1+(1/18))*(1+(1/19))*(1+(1/20))
<gadget id="calculator">21 / 2</gadget>
<output>21/2 = around 10.5</output>

<result>21/2 = around 10.5</result>