Xiao Ming brought some money to Xinhua Bookstore to buy math books and English books. With the money Xiao Ming brought, he could buy 12 math books or 9 English books. Now Xiao Ming bought 8 math books and some English books with the money. How many books did you buy?
小明带了一些钱到新华书店去买数学书和英语书，小明带的钱可以买12本数学书或9本英语书，现在小明用这些钱买了8本数学书和一些英语书，小明共买了多少本书？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 8</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/3) / (1/9)</gadget>
<output>3</output>

<gadget id="calculator">3 + 8</gadget>
<output>11</output>

<result>11</result>