In a flower exhibition, if the radius of a circular exhibition with a diameter of 8 meters is extended by 1 meter to form a new circular exhibition area, what is the circumference of the new exhibition area in meters?
开花卉展览会上，把一个直径是8米的圆形展览的半径向外廷伸1米变成一个新的圆形展区，那么新展区的周长是多少米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">2 * 3.14 * 5</gadget>
<output>31.4</output>

<result>31.4</result>