Two circles of iron wire hoops are to be placed on the outside of a cylindrical water bucket with a bottom radius of 15 cm, and the joint part is 8 cm. How many centimeters of iron wire do you need?
要在底面半径是15厘米的圆柱形水桶外面打上两圈铁丝箍，接头部分是8厘米，需用铁丝多少厘米？
<gadget id="calculator">3.14 * 2 * 15 * 2</gadget>
<output>188.4</output>

<gadget id="calculator">188.4 + 8</gadget>
<output>196.4</output>

<result>196.4</result>