Help! My 6th grade daughter has asked for help with this, and I can't even figure it out!

A sample of iron has the dimensions of 2 cm x 3 cm x 2 cm. If the mass of this rectangular-shaped object is 94 g, what is the density of iron?

Okay, I know the formula is D=M/V, but wouldn't I need the height of the triangle in order to determine the area first? Please help! I am lost!