There are 18 steps to go up each floor in Zhonggang Community, and 90 steps to go from the first floor to Xiaoyan's house. How many floors does she live in?
中港小区每上一层楼要走18级台阶，从一楼到小燕家要走90级台阶，她家住多少楼．
<gadget id="calculator">90 / 18</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>