5 students stand in a row, and the distance between every two adjacent students is 1.2m, so what is the distance in m between the first student and the fifth student?
5个学生站成一排，每相邻2个学生之间的距离是1.2m，那么第1个学生到第5个学生之间的距离是多少m．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">1.2 * 4</gadget>
<output>4.8</output>

<result>4.8</result>