It is known that the bread in the bakery is 15 yuan a piece. Xiao Ming went to this store to buy bread. When he checked out, the clerk told Xiao Ming: "If you buy one more bread, you can get a 10% discount, and the price will be 45 yuan cheaper than now." Xiao Ming said: " I'll just buy these, thank you." According to the conversation between the two, how many breads did Xiao Ming buy at the checkout?
已知面包店的面包一个15元，小明去此店买面包，结账时店员告诉小明："如果你再多买一个面包就可以打九折，价钱会比现在便宜45元"，小明说："我买这些就好了，谢谢．"根据两人的对话，判断结账时小明买了多少个面包？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">15 * (9/10)</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">(27/2) + 45</gadget>
<output>117/2 = around 58.5</output>

<gadget id="calculator">15 - (27/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(117/2) / (3/2)</gadget>
<output>39</output>

<result>39</result>