Calculation: (1+(2/5))*(1-(2/5))*(1+(2/7))*(1-(2/7))*…*(1+(2/5) 2005))*(1-(2/2005)).
计算：(1+(2/5))*(1-(2/5))*(1+(2/7))*(1-(2/7))*…*(1+(2/2005))*(1-(2/2005))．
<gadget id="calculator">3 * 2_007</gadget>
<output>6_021</output>

<gadget id="calculator">5 * 2_005</gadget>
<output>10_025</output>

<gadget id="calculator">6_021 / 10_025</gadget>
<output>6_021/10_025 = around 0.600599</output>

<result>6_021/10_025 = around 0.600599</result>