Aunt Wang bought 3 barrels of "Jinlong" brand edible blending oil, paid the salesperson 150 yuan, and got 9 yuan back. How much is the price of each barrel of oil?
王阿姨买了3桶"金龙"牌食用调和油，付给营业员150元，找回9元，每桶油的价格是多少元？
<gadget id="calculator">150 - 9</gadget>
<output>141</output>

<gadget id="calculator">141 / 3</gadget>
<output>47</output>

<result>47</result>