There is a barrel of oil, and the weight of the barrels is 146 kilograms. After half of the oil is used, the weight of the barrels is 82 kilograms. How many kilograms of oil are there?
有一桶油，连桶共重146千克，用掉一半油后，连桶共重82千克，原来有多少千克油？
<gadget id="calculator">146 - 82</gadget>
<output>64</output>

<gadget id="calculator">64 * 2</gadget>
<output>128</output>

<result>128</result>