When Xiao Ming goes home, he has to walk 20 steps to go up each floor, and he has to walk a total of 60 steps to go home. Which floor does Xiao Ming live on?
小明回家，每上一层楼要走20级台阶，他回家一共要走60级台阶．小明家住在几楼？
<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<result>4</result>