Pointing to a photograph of a lady, Vishal says, "She is the sisterinlaw of my grandfather's daughter". How is the lady in the photograph related to Vishal?
Some equations are solved on the basis of certain system. Find out the correct answer for unsolved equation on that basis: 4 x 5 x 8 = 584, 7 x 3 x 9 = 397, 9 x 7 x 3 = ?