(1/200)+(2/200)+(3/200)+...+(199/200).
(1/200)+(2/200)+(3/200)+…+(199/200)．
<gadget id="calculator">1 + 199</gadget>
<output>200</output>

<gadget id="calculator">199 / 2</gadget>
<output>199/2 = around 99.5</output>

<gadget id="calculator">200 * (199/2)</gadget>
<output>19_900</output>

<gadget id="calculator">19_900 / 200</gadget>
<output>199/2 = around 99.5</output>

<result>199/2 = around 99.5</result>