A rectangular vegetable field is 16 meters long and 10 meters wide, with a wall on one side. How long is the fence surrounding this vegetable field?
一块长方形菜地长16米、宽10米，长的一面是墙，围成这块菜地的篱笆长多少米？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">16 + 20</gadget>
<output>36</output>

<result>36</result>