A rectangular board is 7 decimeters long and 5 decimeters wide. After sawing the largest square from this board, what is the perimeter of the remaining board?
一块长方形木板，长7分米，宽5分米．从这块木板上锯下一个最大的正方形后，剩下木板的周长是多少？
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>