There are 16 seats in a row in the multifunctional classroom. Xiao Min and Xiao Hua are good friends. If you want them to sit together, and Xiao Min is on the left of Xiao Hua, how many ways can they sit in the same row?
多功能教室一排游16个座位，小敏和小华是好朋友，要让他俩坐在一起，且小敏在小华左边，在同一排有多少种坐法．
<gadget id="calculator">16 - 1</gadget>
<output>15</output>

<result>15</result>