The ratio of the number of people in workshops A and B is 2:3. If 3 people from workshop A are transferred to workshop B, the ratio of the number of people in workshops A and B is 1:2. How many people are there in workshop A and B?
甲、乙两车间人数的比是2：3，如果调甲车间3人去乙车间，这时甲乙两车间的人数比是1：2，甲乙两车间共有多少人？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 3</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 + (3/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(1/2) * (3/2)</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(9/2) / (1/4)</gadget>
<output>18</output>

<gadget id="calculator">18 * (3/2)</gadget>
<output>27</output>

<gadget id="calculator">18 + 27</gadget>
<output>45</output>

<result>45</result>