The school has a rectangular garden with a width of 15 meters. Later, the width was increased by 8 meters, so the area of the garden increased by 240 square meters. What is the area of the garden now?
学校有一条宽为15米的长方形花园，后来把宽增加了8米，于是这个花园的面积增加了240㎡．现在这个花园的面积是多少平方米？
<gadget id="calculator">240 / 8</gadget>
<output>30</output>

<gadget id="calculator">15 + 8</gadget>
<output>23</output>

<gadget id="calculator">30 * 23</gadget>
<output>690</output>

<result>690</result>