(1+(1/(1*3)))*(1+(1/(2*4)))*…*(1+(1/(8*10))).
(1+(1/(1*3)))*(1+(1/(2*4)))*…*(1+(1/(8*10)))．
<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<gadget id="calculator">18 / 10</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>