There are 1200 science and technology books in the school library, more than story books (1/5). How many story books are there in the library?
学校图书馆里的科技书有1200本，比故事书多(1/5)．图书馆里的故事书有多少本？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1_200 / (6/5)</gadget>
<output>1_000</output>

<result>1_000</result>