There are 18 steps to go up each floor of a building, Xiao Ming has to walk 54 steps to Xiao Min's house, how many floors does Xiao Min's house live in?
一座楼房每上一层要走18级台阶，小明到小敏家要走54级台阶，小敏家住在多少楼．
<result>5</result>