(1+(1/2))(1+(1/4))(1+(1/6))(1+(1/8))(1+(1/10))(1-(1 /3))(1-(1/5))(1-(1/7))(1-(1/9))(1-(1/11))=how much.
(1+(1/2))(1+(1/4))(1+(1/6))(1+(1/8))(1+(1/10))(1-(1/3))(1-(1/5))(1-(1/7))(1-(1/9))(1-(1/11))=多少．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">7 / 6</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">11 / 10</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">10 / 11</gadget>
<output>10/11 = around 0.909091</output>

<gadget id="calculator">(3/2) * (5/4) * (7/6) * (9/8) * (11/10) * (2/3) * (4/5) * (6/7) * (8/9) * (10/11)</gadget>
<output>1</output>

<result>1</result>