There are small flags in three colors: red, yellow, and blue. Arrange the small flags in sequence as a signal, and different colors indicate different signals. How many different signals can be represented in total?
有红、黄、蓝3种颜色的小旗，把小旗顺序进行排列作为一种信号，颜色排列顺序不同表示的信号也不同．一共可以表示多少种不同的信号？
<gadget id="calculator">3 * 2 * 1</gadget>
<output>6</output>

<result>6</result>