The area of a rectangular garden is 252 square meters and the width is 7 meters. If the length remains the same and the width increases to 21 meters, how many square meters will the area of the garden become?
一个长方形花园的面积是252平方米，宽为7米，如果长不变宽增加到21米，这个花园的面积变成多少平方米？
<gadget id="calculator">252 / 7</gadget>
<output>36</output>

<gadget id="calculator">36 * 21</gadget>
<output>756</output>

<result>756</result>