'Drachma' in the Bible

After they arrived in Capernaum, the collectors of the temple tax came to Peter and said, "Your teacher pays the double drachma tax, doesn't he?"

But so that we don't offend them, go to the lake and throw out a hook. Take the first fish that comes up, and when you open its mouth, you will find a four drachma coin. Take that and give it to them for me and you."