(1/(2*4*6))+(1/(4*6*8))+(1/(6*8*10)).
(1/(2*4*6))+(1/(4*6*8))+(1/(6*8*10))．
<gadget id="calculator">2 * 4 * 6</gadget>
<output>48</output>

<gadget id="calculator">1 / 48</gadget>
<output>1/48 = around 0.020833</output>

<gadget id="calculator">4 * 6 * 8</gadget>
<output>192</output>

<gadget id="calculator">1 / 192</gadget>
<output>1/192 = around 0.005208</output>

<gadget id="calculator">6 * 8 * 10</gadget>
<output>480</output>

<gadget id="calculator">1 / 480</gadget>
<output>1/480 = around 0.002083</output>

<gadget id="calculator">(1/48) + (1/192) + (1/480)</gadget>
<output>9/320 = around 0.028125</output>

<result>9/320 = around 0.028125</result>