Given that Rob has 4 shirts, 3 pairs of pants, and 2 pair of shoes.
Rob has 4 shirts, he can wear each with 3 different pairs of pants.
Thus,
![\begin{gathered} 4\text{ }*3 \\ =12 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/k2qifrbzomt15b09v5y89976aehdd81g3a.png)
Each of the combinations can be worn with 2 different pairs of shoes. Thus,
![\begin{gathered} 12*2 \\ =24 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/gbqsslnivxrmnee10lvamo1n187dwd4749.png)
This implies that Rob can put his outfit together in 24 ways.