There are 20 seats in each row of the school conference room. Teacher Wang and Teacher Zhang are going to sit in the adjacent seats in the first row. How many different ways are there in total?
学校会议室每排有20个座位，王老师和张老师准备坐在第一排相邻的座位上，一共有多少种不同的坐法？
<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">19 * 2</gadget>
<output>38</output>

<result>38</result>