A rectangular vegetable field is 42 meters long and 19 meters wide. What is the circumference of this vegetable field?
一块长方形菜地，长42米，宽19米，这块菜地周长多少米？
<gadget id="calculator">42 + 19</gadget>
<output>61</output>

<gadget id="calculator">61 * 2</gadget>
<output>122</output>

<result>122</result>