Cut a roll of iron wire every 0.8 meters to make a hanger. A total of 325 pieces were made, and there are 12.5 meters left. How many meters is this roll of iron wire originally?
一卷铁丝，每0.8米剪一段，做一个衣架，一共做了325个，还剩12.5米，这卷铁丝原来长多少米？
<gadget id="calculator">0.8 * 325</gadget>
<output>260</output>

<gadget id="calculator">260 + 12.5</gadget>
<output>272.5</output>

<result>272.5</result>