Jack is studying his family tree. He sees that he has one set of parents, and each of his parents has a set of parents, and so on. The total number of people from g generations ago from whom Jack descends can be found using the formula $\displaystyle{P}={{2}}^{{g{}}}\usepackage{cmbright}\Huge\$ . From how many people from 6 generations ago does Jack descend?

The total number of people from whom Jack descends is _____.