(1-(1/2)*(1/2))*(1-(1/3)*(1/3))*(1-(1/4)*(1/4))*...* (1-(1/2003)*(1/2003))
(1-(1/2)*(1/2))*(1-(1/3)*(1/3))*(1-(1/4)*(1/4))*…*(1-(1/2003)*(1/2003))
<gadget id="calculator">1_002 / 2_003</gadget>
<output>1_002/2_003 = around 0.50025</output>

<result>1_002/2_003 = around 0.50025</result>