If the lengths of two adjacent sides of a parallelogram are 4 cm and 3 cm respectively, what is its perimeter in cm?
平行四边形相邻的两条边长分别是4厘米、3厘米，它的周长是多少厘米．
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>