A story book has three times as many pages as a science book. This story book has 93 pages. How many pages does this science book have? (List the equations with unknowns first, and then calculate)
一本故事书的页数是一本科技书的3倍，这本故事书有93页，这本科技书有多少页？(先列出含有未知数的等式，再计算)
<gadget id="calculator">93 / 3</gadget>
<output>31</output>

<result>31</result>