rectangular green space needs to be expanded. The original area is 150 square meters and the width is 5 meters. The length remains the same and the width is increased by 15 meters. How many square meters is the enlarged area?
一块长方形绿地要扩大，原来面积是150平方米，宽5米，长不变把宽增加了15米，扩大后的面积是多少平方米？
<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">5 + 15</gadget>
<output>20</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>