There is a cube whose six faces are 1, 2, 3, 4, 5, and 6. What is the probability of getting a prime number by rolling the dice once?
有一个六个面上的数字分别是1、2、3、4、5、6的正方体的骰子，投一次骰子得到质数的可能性是多少
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>