A large chunk of marzipan is dropped into a mysterious fluid. Precisely half of the sweet substance is submerged. The density of the marzipan is 530 kg/m³, so what is the density of the fluid? Do not include units on numerical results. If you intend to use scientific notation, use the capital E to represent "x10^". For example 1.7x10^-2kg should be entered as 1.7E-2 instead.