A barrel of lacquer weighs 8 kilograms, and after half of it is sold, the weight of the barrel is 4.5 kilograms. If 10.5 yuan per kilogram of paint, how much can this bucket of paint be sold for?
一桶漆连桶重8千克，卖出一半后，连桶重4.5千克．如果每千克漆10.5元，这桶漆可卖多少元？
<gadget id="calculator">8 - 4.5</gadget>
<output>3.5</output>

<gadget id="calculator">3.5 * 2 * 10.5</gadget>
<output>73.5</output>

<result>73.5</result>