The area of a rectangular vegetable field is 400 square meters and the width is 8 meters. Now increase the width of the vegetable field to 32 meters and keep the length unchanged. So what is the area of the expanded vegetable field?
长方形菜地的面积是400平方米，宽是8米．现在把菜地的宽增加到32米，长不变．那么扩大后的菜地面积是多少？
<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<gadget id="calculator">400 * 4</gadget>
<output>1_600</output>

<result>1_600</result>