Calculation: (1-(1/(2**2)))*(1-(1/(3**2)))*(1-(1/(4**2)))*…*( 1-(1/(2014**2))).
计算：(1-(1/(2**2)))*(1-(1/(3**2)))*(1-(1/(4**2)))*…*(1-(1/(2014**2)))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2_015 / 2_014</gadget>
<output>2_015/2_014 = around 1.000497</output>

<gadget id="calculator">(1/2) * (2_015/2_014)</gadget>
<output>2_015/4_028 = around 0.500248</output>

<result>2_015/4_028 = around 0.500248</result>