A rectangular test field is 80 meters long and 35 meters wide. What is the circumference in meters?
一块长方形试验田，长80米，宽35米，周长是多少米？
<gadget id="calculator">80 + 35</gadget>
<output>115</output>

<gadget id="calculator">115 * 2</gadget>
<output>230</output>

<result>230</result>