There are 120 story books in the library, which account for 1/4 of the science books, and 1/6 of the textbooks. How many textbooks are there?
图书馆有故事书120本，占科技书的(1/4)，科技书占教材的(1/6)，教材有多少本？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 / (1/4) / (1/6)</gadget>
<output>2_880</output>

<result>2_880</result>