Divide a circle into 8 equal parts, paint 3 of them red, 2 blue, 1 green, and the rest white, what is the probability that the pointer stops at the white part after rotating around the center
把一个圆8等分，其中3份涂成红色，2份涂成蓝色，1份涂成绿色，剩下的部分涂成白色，指针绕中心旋转后停在白色部分的可能性是多少
<gadget id="calculator">8 - 3 - 2 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>