The area of a rectangle is 120 square meters. If its length is quadrupled and its width remains the same, what is the area of the rectangle now?
一个长方形的面积是120平方米，如果把它的长扩大到原来的4倍，宽不变，现在长方形的面积是多少平方米．
<gadget id="calculator">120 * 4</gadget>
<output>480</output>

<result>480</result>