A barrel of oil weighs 102.5 kilograms, and after selling half of it, the weight of the barrels is still 52.5 kilograms. If the price per kilogram of oil is 6.72 yuan, how much can this barrel of oil sell for?
一桶油连桶重102.5千克，卖出一半后，连桶还重52.5千克．如果每千克油的价钱是6.72元，这桶油能卖多少钱？
<gadget id="calculator">102.5 - 52.5</gadget>
<output>50</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">100 * 6.72</gadget>
<output>672</output>

<result>672</result>