We are an isosceles garden, and the lengths of the two sides are 10 and 20 meters respectively. What is the length of the fence to surround the vegetable garden?
大家块等腰形的园，其两边的长别为是10和20米．要在菜园的边上围篱笆篱笆的长是多少米？
<gadget id="calculator">10 + 10 + 10 + 10 + 10</gadget>
<output>50</output>

<result>50</result>