I am very confused, our teacher didn’t properly teach us this. How do you do it?

Answer:
You multiply the 3 numbers together to get your volume, in this case it would be 4058.488 cm^3 (cm cubed)
so
V: 4058.488cm^3 ( round up to 4058.5 for convenience)
M: 27579
D: ?
So we divide mass by the volume to get density, which is
27579 / 4058.5 = ~6.79536 (can round up to 7 or 6.8)
This graph can help a lot, so maybe try and memorize it, hope I helped.
Answer:
6.79539 g/cm³
Explanation:
Density equals mass divided by volume. First calculate your volume by multiplying the three dimensions that you were provided then divide 27,579 g by 4,058.488 cm³ to get density.