If 2 carpenters can build 4 chairs in 3 hours, then how many chairs can 6 carpenters build in 6 hours?

If 2 carpenters can build 4 chairs in 3 hours, then a carpenter can build 1 chair in 1.5 hours. 1 carpenter can build 4 chairs in 6 hours, and 6 carpenters can build 24 chairs in 6 hours.