A bundle of iron wire has 100 turns, and each turn has a diameter of 80 cm. How many meters is the total length of the bundle of iron wire?
一捆铁丝有100圈，每圈直径为80厘米，这捆铁丝一共长多少米？
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 80 * 1</gadget>
<output>251.2</output>

<result>251.2</result>