15 students stand in a column, with an interval of 1 meter between each pair, how many meters is the total length of the team?
15个同学站成1路纵队，每两人之间间隔1米，队伍一共长多少米．
<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">14 * 1</gadget>
<output>14</output>

<result>14</result>