A rectangular vegetable field is 98.5 meters long and 47 meters wide. What is the perimeter of this vegetable field in meters? (Write out the calculation formula, express it in letters, and calculate)
一块长方形菜地，长是98.5米，宽是47米，这块菜地的周长是多少米？(写出计算公式，用字母表示，并计算)
<gadget id="calculator">98.5 + 47</gadget>
<output>145.5</output>

<gadget id="calculator">145.5 * 2</gadget>
<output>291</output>

<result>291</result>