There are 112 books in the upper and lower floors of the bookshelf. If (1/9) of the books in the lower layer are moved to the upper layer, the number of books in the two layers is equal. How many books are there in the lower layer?
书架上下两层共有112本书，若将下层书的(1/9)移到上层，两层书本数相等，下层原有书多少本？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 - (1/9)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">112 / 2 / (8/9)</gadget>
<output>63</output>

<result>63</result>