barrel of oil weighs 45 kilograms, and after pouring out half of it, there is still 23 kilograms left in the barrel. If this oil sells for 4.5 yuan per kilogram, how much can a barrel of oil sell for?
一桶油连桶重45千克，倒出一半后连桶还剩23千克．如果这种油每千克卖4.5元，一桶油可以卖多少元？
<gadget id="calculator">45 - 23</gadget>
<output>22</output>

<gadget id="calculator">22 * 2 * 4.5</gadget>
<output>198</output>

<result>198</result>