There are 729 story books in the bookstore, the number of science books is storybooks (8/9), and comic books are science books (5/8), how many comic books are there?
书店有故事书729本，科技书的本数是故事书的(8/9)，漫画书是科技书的(5/8)，漫画书有多少本？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">729 * (8/9) * (5/8)</gadget>
<output>405</output>

<result>405</result>