Logarithm

log₂(336/85766121)

Note that  we can do this in a couple of ways....here's one

Using the property of logs we can write

log₂ 336  - log₂ 85766121

And using the chage-of-base rule we can write

log336 / log 2   - log 85766121 / log 2  =

[log 336 - log 85766121] / log 2  ≈ -17.96