Use iron wire to add a hoop outside a cylindrical bucket with a radius of 30 cm, and use 5 cm more at the joint. How many centimeters of iron wire are needed in total?
用铁丝在一个半径是30厘米的圆柱形水桶外面加一圈箍，接头处多用5厘米，共需要多少厘米长的铁丝．
<gadget id="calculator">2 * 3.14 * 30</gadget>
<output>188.4</output>

<gadget id="calculator">188.4 + 5</gadget>
<output>193.4</output>

<result>193.4</result>