There is a rectangular vegetable field with a length of 6.5 meters and a width of 0.8 times its length. What is the area of this rectangular vegetable field in square meters?
有一个长是6.5米、宽是长的0.8倍的长方形菜地，请问这个长方形菜地的面积是多少平方米．
<gadget id="calculator">6.5 * 0.8</gadget>
<output>5.2</output>

<gadget id="calculator">6.5 * 5.2</gadget>
<output>33.8</output>

<result>33.8</result>