Teacher Lei, the class teacher, wants to paste 5 portraits of scientists on a 6-meter-long wall. The width of each portrait is 0.72 meters. What is the distance in meters between two adjacent portraits?
班主任雷老师要把5张科学家画像贴到6米长的墙上，每张画像的宽是0.72米，要求墙的两端空出的长度与相邻两张画像之间的距离都相等．相邻两张画像之间的距离是多少米？
<gadget id="calculator">5 * 0.72</gadget>
<output>3.6</output>

<gadget id="calculator">6 - 3.6</gadget>
<output>2.4</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">2.4 / 6</gadget>
<output>0.4</output>

<result>0.4</result>