The library has bought 50 new science and technology books, and the newly bought story books are five times the number of science and technology books. How many books are there in total?
图书室新买来50本科技书，新买来的故事书是科技书的5倍，两种书共有多少本？
<gadget id="calculator">50 * 5</gadget>
<output>250</output>

<gadget id="calculator">250 + 50</gadget>
<output>300</output>

<result>300</result>