There are two construction teams, A and B, and the number of team A accounts for the total number of the two teams (7/10). If 30 people are sent from team A to team B, the ratio of the number of teams A and B is 3:2 ． How many people are there in Team A and Team B?
甲、乙两个建筑队，甲队人数占甲、乙两队总人数的(7/10)，如果从甲队派30人到乙队，则甲、乙两队人数的比是3：2．甲、乙两队共有多少人．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

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

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(7/10) - (3/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">30 / (1/10)</gadget>
<output>300</output>

<result>300</result>