Sorry, I'm not sure about the divination of the Book of Changes. Ask experts to answer. What kind of divination method is three coins?

If you just want to know 64 hexagrams, don't bother, just find 6 squares of copper coins and arrange them according to the distance. If you want to calculate in more detail, you'd better have someone to guide you. As for one tail and three heads, that's impossible. Usually it only costs three yuan. How did you get four?