A rectangular vegetable field is 105 meters long and 45 meters wide. If the width is increased by 5 meters and the length remains the same, how much will the area of the vegetable field increase?
一块长方形菜地，长105米，宽45米．若宽增加5米，长不变，菜地的面积将增加多少？
<gadget id="calculator">5 * 45</gadget>
<output>225</output>

<result>225</result>