Xiao Ming lives upstairs. There are 15 steps to go up each floor of this building. Xiao Ming walks a total of 60 steps to go home from school. How many floors does Xiao Ming live in?
小明家住楼上，这座楼每上一层要走15级台阶，小明放学回家一共走了60级台阶，小明家住多少楼．
<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>