There is a rectangular flowerbed on the hillside, 25 meters long and 12 meters wide. A fence is built around the flowerbed. How many meters of fence is needed to surround the flowerbed?
山坡上有一块长方形花圃，长25米，宽12米，在花圃四周围上篱笆，要多少米的篱笆才把花圃围上？
<gadget id="calculator">25 + 12</gadget>
<output>37</output>

<gadget id="calculator">37 * 2</gadget>
<output>74</output>

<result>74</result>