A rectangular orchard is 15 meters wide and has an area of 375 square meters. If a fence is built around the orchard, how many meters of fence is needed?
一个长方形果园，宽是15米，面积是375平方米．如果在这个果园的四周围上篱笆，则需篱笆多少米？
<gadget id="calculator">375 / 15</gadget>
<output>25</output>

<gadget id="calculator">25 + 15</gadget>
<output>40</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<result>80</result>