If one side of a parallelogram is 12 cm and its adjacent side is 2 cm shorter than it, what is the perimeter of the parallelogram in cm?
一个平行四边形的一条边是12厘米，它的邻边比它少2厘米，这个平行四边形的周长是多少厘米．
<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">12 + 10</gadget>
<output>22</output>

<gadget id="calculator">22 * 2</gadget>
<output>44</output>

<result>44</result>