There are a total of 220 story books and science books in a certain library, among which 30% of the story books are 10 more than 50% of the science books. How much more are the story books than the science books?
某图书馆存有的故事书和科技书共220本，其中故事书本数的30%，比科技书的50%多10本，故事书的本数比科技书多多少本
<gadget id="calculator">220 - 150</gadget>
<output>70</output>

<gadget id="calculator">150 - 70</gadget>
<output>80</output>

<result>80</result>