a building. There are 16 steps between the adjacent upper and lower floors. From the 1st floor to the 6th floor, how many steps do you have to climb in total?
一幢楼房．相邻的上下两层之间都有16级台阶，从1楼到6楼，一共要爬多少级台阶．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<result>80</result>