rectangle and a square have the same area. It is known that the side length of the square is 0.8 meters, the length of the rectangle is 4 meters, and how many meters is the width of the rectangle?
一个长方形和一个正方形的面积相等，已知正方形的边长是0.8米，长方形的长是4米，长方形的宽是几米？
<gadget id="calculator">0.8 / 4</gadget>
<output>0.2</output>

<gadget id="calculator">0.8 * 0.2</gadget>
<output>0.16</output>

<result>0.16</result>