The sum of two consecutive even numbers is 22. What is the product of these two even numbers?
两个连续偶数的和是22，这两个偶数的积是多少．
<gadget id="calculator">22 - 2</gadget>
<output>20</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<gadget id="calculator">10 * 12</gadget>
<output>120</output>

<result>120</result>