A barrel of oil is 50kg including the barrel, and 14kg of oil is added. Now the quality of the oil is twice that of the original oil. How many kilograms does the barrel weigh?
一桶油连油带桶有50kg，再加14kg的油，现在油的质量是原来油的质量的2倍，桶重多少千克？
<gadget id="calculator">50 - 14</gadget>
<output>36</output>

<result>36</result>