(1+(1/2))*(1-(1/2))*(1+(1/3))*(1-(1/3))*...*(1+(1/10) )*(1-(1/10))
(1+(1/2))*(1-(1/2))*(1+(1/3))*(1-(1/3))*…*(1+(1/10))*(1-(1/10))
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">11 / 10</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(1/2) * 1 * (11/10)</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>