A tub has a round bottom. A 2.552-meter-long iron wire is hooped at its bottom, and 0.04 meters are used at the joint of the iron wire. What is the diameter of the bottom of this tub?
一个木盆的底面是圆形．在它的底部箍一根长2.552米的铁丝，铁丝的接头处用了0.04米．这个木盆的底面直径是多少米？
<gadget id="calculator">2.552 - 0.04</gadget>
<output>2.512</output>

<gadget id="calculator">2.512 / 3.14</gadget>
<output>0.8</output>

<result>0.8</result>