A and B compete to climb the stairs. A runs to the 4th floor, and B happens to go to the 3rd floor. According to this calculation, when A runs to the 16th floor, which floor does B go to? You are smart, think clearly!
甲、乙二人比赛爬楼梯，甲跑到第4层，乙恰好跑到第3层，照这样计算，甲跑到第16层时，乙跑到第几层？聪明的你要想清楚哟！
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>