A rectangular piece of land is 6 meters long and has an area of 230 square meters. Now the length of this piece of land is increased to 12 meters and the width remains unchanged. What is the area of the expanded land in square meters?
一块长方形地长是6米，面积是230平方米，现在这块地的长增加到12米，宽不变，扩大后的地的面积是多少平方米．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">230 * 2</gadget>
<output>460</output>

<result>460</result>