A barrel of oil weighs 56 kilograms in total. If one third of the oil is poured out, the weight of the remaining oil is four times the weight of the barrel. How many kilograms does the original oil weigh?
一桶油连桶共重56千克，倒了油的(1/3)，这时剩下的油的重量是桶重的4倍，原来油重多少千克？
<gadget id="calculator">4 * 56</gadget>
<output>224</output>

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

<gadget id="calculator">4 - (1/3)</gadget>
<output>11/3 = around 3.666667</output>

<gadget id="calculator">1 + (11/3)</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">224 / (14/3)</gadget>
<output>48</output>

<result>48</result>