The area of a rectangular vegetable field is 360 square meters. Now a pigsty is built on a part of the field. It is known that the width of the vegetable field remains the same, but the length is reduced from 90 meters to 45 meters. Now the area of the vegetable field is how many?
一块长方形菜地的面积是360平方米，现在把这块地的一部分盖了个猪圈，已知菜地的宽不变，只是长由原来的90米缩小到45米，现在菜地的面积是多少？
<gadget id="calculator">90 / 45</gadget>
<output>2</output>

<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<result>180</result>