Liangliang placed 5 chess pieces equidistantly on the table along a straight line. It is known that the distance from the first to the fifth is 8 cm. What is the distance between every two chess pieces?
亮亮沿一条直线在桌子上等距离地摆了5颗棋子，已知第1颗到第5颗的距离是8厘米，每两颗棋子的距离是多少？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<result>2</result>