There are two workshops, A and B, with the same number of people. Due to work needs, 45 people are transferred from workshop A to workshop B. At this time, the number of people in workshop B is exactly 4 times the number of people in workshop A. How many people are there in each workshop of A and B?
有甲乙两个人数相等的车间，由于工作需要，从甲车间调45人到乙车间，这时乙车间的人数正好是甲车间人数的4倍，求甲、乙每个车间原有多少人？
<gadget id="calculator">45 * 4</gadget>
<output>180</output>

<gadget id="calculator">45 + 180</gadget>
<output>225</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">225 / 3</gadget>
<output>75</output>

<result>75</result>