The length of a rectangle is 8.4 meters and 2.8 times its width. What is the area of this rectangle?
一个长方形的长是8.4米，是宽的2.8倍，这个长方形的面积是多少平方米？
<gadget id="calculator">8.4 / 2.8</gadget>
<output>3</output>

<gadget id="calculator">3 * 8.4</gadget>
<output>25.2</output>

<result>25.2</result>