A rectangular lawn is 200 meters long and 16 meters wide. Leave 350 square meters in the middle as a fountain, and the rest are planted with turf. How many square meters is the area of the turf?
一块长方形草坪长200米，宽16米．中间留下350平方米的地方做喷水池，其余的种草皮．种草皮的面积是多少平方米？
<gadget id="calculator">200 * 16</gadget>
<output>3_200</output>

<gadget id="calculator">3_200 - 350</gadget>
<output>2_850</output>

<result>2_850</result>