The original ratio of the number of people in teams A and B is 7:3. Some people are transferred from team A to team B. The ratio of the number of people in teams A and B is 3:2. Team B now has 120 people. How many people are transferred from team A to team B? ?
甲乙两队原来人数的比是7：3，从甲队调出一些人给乙队，甲乙两队的人数比3：2，乙队现在有120人，从甲队调出几人到乙队？
<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">120 / (2/5)</gadget>
<output>300</output>

<gadget id="calculator">3 + 7</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">300 * (3/10)</gadget>
<output>90</output>

<gadget id="calculator">120 - 90</gadget>
<output>30</output>

<result>30</result>