The area of a rectangular campus is 8 hectares. If the width remains the same and the length is expanded to 4 times the original size, what is the area of the campus after the expansion?
一个长方形校园的面积是8公顷，若宽不变，长扩大到原来的4倍，扩建后校园的面积是多少公顷．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>