A barrel of oil weighs 80 kilograms, and an empty barrel weighs 8 kilograms. If the price of oil per kilogram is 6 yuan, how much does it cost to buy this barrel of oil?
一桶油连桶重80千克，空桶重8千克，如果每千克油售价6元，买这桶油需要多少钱？
<gadget id="calculator">80 - 8</gadget>
<output>72</output>

<gadget id="calculator">72 * 6</gadget>
<output>432</output>

<result>432</result>