The school purchased a total of 1,000 literature and art books and science and technology books. The number of literature and art books purchased was four times that of science and technology books. How many science and technology books were purchased?
学校购进文艺书和科技书共1000本，购进的文艺书是科技书的4倍，购进科技书多少本？
<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">1_000 / 5</gadget>
<output>200</output>

<result>200</result>