Answer :
856 feet of the lobby floor is left uncovered.
38*24=912 Solve for the area of the lobby.
4*2*7=56 Solve for how much area is taken up by the 7 rugs.
912-56=856
38*24=912 Solve for the area of the lobby.
4*2*7=56 Solve for how much area is taken up by the 7 rugs.
912-56=856