For a bottle of alcohol, pour (2/3) another 20 grams for the first time, then pour back 35 grams, and pour out (1/2) of it for the second time, and there are still 45 grams of alcohol in the bottle at this time. How many grams of wine are there in the original bottle?
酒精一瓶，第一次倒去(2/3)又20克，然后倒回35克，第二次再倒出其中的(1/2)，这时瓶里还剩下酒精45克．原来瓶中有酒多少克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">45 / (1/2)</gadget>
<output>90</output>

<gadget id="calculator">90 - 35</gadget>
<output>55</output>

<gadget id="calculator">55 + 20</gadget>
<output>75</output>

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

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">75 / (1/3)</gadget>
<output>225</output>

<result>225</result>