There are 900 workers in factory A and 700 workers in factory B. The same number of workers are selected from the two factories to participate in tree planting activities. The ratio of the remaining workers in the two factories is 3:2. How many people went to participate in the tree planting activities?
甲厂有工人900人，乙厂有工人700人，从这两个厂选同样多的人参加植树活动，两个厂剩下的人数之比是3：2，从这两个厂各选了多少人去参加植树活动？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 700</gadget>
<output>1_050</output>

<gadget id="calculator">1_050 - 900</gadget>
<output>150</output>

<gadget id="calculator">(3/2) - 1</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">150 / (1/2)</gadget>
<output>300</output>

<result>300</result>