((1/2)+(1/3)+(1/4)+...+(1/20))+((2/3)+(2/4)+(2/5)+...+( 2/20))+((3/4)+(3/5)+…+(3/20))+…+((18/19)+(18/20))+(19/20)=
((1/2)+(1/3)+(1/4)+…+(1/20))+((2/3)+(2/4)+(2/5)+…+(2/20))+((3/4)+(3/5)+…+(3/20))+…+((18/19)+(18/20))+(19/20)=
<gadget id="calculator">1 + 19</gadget>
<output>20</output>

<gadget id="calculator">19 / 2 / 2</gadget>
<output>19/4 = around 4.75</output>

<gadget id="calculator">20 * (19/4)</gadget>
<output>95</output>

<result>95</result>