A barrel of oil weighs 20 kilograms. After pouring out (1/3), the barrel still weighs 14 kilograms. How many kilograms does the barrel weigh?
一桶油连桶重20千克，倒出(1/3)后，连桶还重14千克，桶重多少千克．
<gadget id="calculator">20 - 14</gadget>
<output>6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / (1/3)</gadget>
<output>18</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<result>2</result>