A piece of lawn is 30 meters long and 20 meters wide. If the width is increased by 5 meters and the length remains the same, what is the area of the enlarged lawn?
一块草坪长30米，宽20米，如果把宽增加5米，长不变，扩大后的草坪面积是多少．
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">30 * 25</gadget>
<output>750</output>

<result>750</result>