There is a bottle of alcohol, pour out (2/3) another 80 grams for the first time, then pour back 140 grams, and pour out (3/4) of the alcohol in the bottle for the second time, and there are still 90 grams in the bottle at this time ． How many grams of alcohol are there in the original bottle?
有一瓶酒精，第一次倒出(2/3)又80克，然后又倒回140克，第二次又倒出瓶里酒精的(3/4)，这时瓶里还剩下90克．原来瓶里有酒精多少克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">140 * (3/4)</gadget>
<output>105</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">90 - 60 - 140</gadget>
<output>-110</output>

<gadget id="calculator">80 + 105 + (-110)</gadget>
<output>75</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">(1/2) - (3/4) - (2/3)</gadget>
<output>-11/12 = around -0.916667</output>

<gadget id="calculator">1 + (-11/12)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">75 / (1/12)</gadget>
<output>900</output>

<result>900</result>