The supermarket buys 8 packs of wool, each pack is 5 kg, and the total cost is 480 yuan. How much is it per kilogram of wool?
超市购进毛线8包，每包5千克，共用去480元．每千克毛线多少元？
<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">480 / 40</gadget>
<output>12</output>

<result>12</result>