Here's a breakdown of the formula:

* CH₃: This represents a methyl group (one carbon atom bonded to three hydrogen atoms).

* CO: This represents a carbonyl group (a carbon atom double-bonded to an oxygen atom).

* CH₂: This represents a methylene group (one carbon atom bonded to two hydrogen atoms).

* CH₃: This represents another methyl group.

You can also see butanone represented as C₄H₈O which is the molecular formula, showing the total number of each type of atom.