The original square green area of Songbai Park is 100 square meters. If the length of the green area is now increased to 12 meters, the width remains unchanged. How many square meters is the expanded green area?
松柏公园原来一块正方形的绿地面积是100平方米，如果现在要把绿地的长增加到12米，宽保持不变．问扩大后的绿地面积是多少平方米？
<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<result>120</result>