How many ways can 5 children line up to get on the school bus if Jenny always gets on third

Normally, it would be 5x4x3x2x1; decreasing as the number of children decreases, from being in line. However, because Jenny is always third, it would be 4x3x1x2x1, or 24. There are 24 ways the children can line up if Jenny is always third in line.