The ratio of science books to story books in the library is 2:3. In the morning, put a batch of newly purchased science books in the library. After finishing, the ratio of science books to story books is 10:9; Put the newly purchased story books into the library. At this time, the ratio of science books to story books is 5:6. Only newly purchased technology books are 100 more than story books. How many science books and story books are there in the original library?
图书室中的科技书与故事书的数量比是2：3，上午将新购进的一批科技书设放到图书室，整理后，科技书与故事书的本数比是10：9；下午又将新购进的故事书与投放到图书室，这时科技书与故事书的本数比是5：6．已只新购进的科技书比故事书多100本．原来图书室有科技书和故事书共有多少本？
<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">10 - 6 - 3</gadget>
<output>1</output>

<gadget id="calculator">6 + 9</gadget>
<output>15</output>

<gadget id="calculator">100 * 1 * 15</gadget>
<output>1_500</output>

<result>1_500</result>