There is a bookshelf. There are 200 books on the upper shelf, which is 25 books less than 1.5 times that on the lower shelf. How many books are there in total on this bookshelf?
有一个书架，上层有200本书，比下层的1.5倍少25本，这个书架共放书多少本．
<gadget id="calculator">25 + 200</gadget>
<output>225</output>

<gadget id="calculator">225 / 1.5</gadget>
<output>150</output>

<gadget id="calculator">200 + 150</gadget>
<output>350</output>

<result>350</result>