Ao Zema and Koizumi bought back two boxes of milk with the same quantity, and agreed to drink the first box together first, and then drink the second box. The ratio of the number of bottles drunk by Ao Zema and Koizumi in the first box was 3:2; The ratio of the number of bottles drunk by Zhongao Zebra and Koizumi is 3:4. It is known that the number of bottles Koizumi drank in the first box is 12 fewer than the number of bottles in the second box, so how many bottles are there in the two boxes of milk?
奥斑马、小泉买回两箱数量相同的牛奶，并约定先一起喝第一箱，再喝第二箱，第一箱中奥斑马与小泉喝的瓶数之比是3：2；第二箱中奥斑马与小泉喝的瓶数之比是3：4．已知小泉在第一箱喝的瓶数比在第二箱喝的瓶数少12瓶，那么两箱牛奶共有多少瓶．
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/7) - (2/5)</gadget>
<output>6/35 = around 0.171429</output>

<gadget id="calculator">12 / (6/35)</gadget>
<output>70</output>

<gadget id="calculator">70 * 2</gadget>
<output>140</output>

<result>140</result>