A barrel of oil, after eating (4/5), there is still (5/6) kilograms left, how much does the barrel of oil weigh in kilograms? What is the correct column
一桶油，吃去(4/5)，还剩(5/6)千克，这桶油原来重多少千克？正确的列式为多少
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/6) / (1/5)</gadget>
<output>25/6 = around 4.166667</output>

<result>25/6 = around 4.166667</result>