There is some oil in a barrel, and the oil and the barrel weigh 108 kilograms. The first pour (2/3) is 5 kilograms less, and the second pour (3/4) is 3 kilograms more. At this time The remaining oil and barrels weighed 21 kg. How many kilograms is this barrel of oil?
一个桶里装了一些油，油和桶共重108千克，第一次倒出(2/3)少5千克，第二次倒出剩下的(3/4)还多3千克，这时剩下的油和桶共重21千克．原来这桶油油多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 * (3/4)</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">5 - (15/4) - 3 - 21</gadget>
<output>-91/4 = around -22.75</output>

<gadget id="calculator">108 + (-91/4)</gadget>
<output>341/4 = around 85.25</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * (3/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) + (1/4)</gadget>
<output>11/12 = around 0.916667</output>

<gadget id="calculator">(341/4) / (11/12)</gadget>
<output>93</output>

<result>93</result>