There is a building with 18 steps to go up each floor, and 126 steps to Tiantian's house. How many floors does his family live in?
有一栋楼房，每上一层要走18级台阶，到天天家要走126级台阶，他家住在多少楼．
<gadget id="calculator">126 / 18</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>