There are 18 steps to go up each flight of stairs, and 72 steps to go to Xiao Ming's house. How many floors does Xiao Ming's house live on?
每上一层楼梯要走18级台阶，到小明家要走72级台阶，小明家住在多少楼．
<gadget id="calculator">72 / 18</gadget>
<output>4</output>

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

<result>5</result>