The area of a rectangular lawn is 420 square meters, and the length is 30 meters. Now the width remains the same. After increasing the length to 80 meters, how many square meters is the area?
一个长方形草坪的面积是420平方米，长是30米，现在宽不变，将长增加到80米后，面积是多少平方米？
<gadget id="calculator">420 / 30</gadget>
<output>14</output>

<gadget id="calculator">80 * 14</gadget>
<output>1_120</output>

<result>1_120</result>