To find out how many steps Mario walked per hour, you can divide the total number of steps by the total number of hours. In this case:
\[ \text{Steps per hour} = \frac{\text{Total steps}}{\text{Total hours}} = \frac{3600 \text{ steps}}{24 \text{ hours}} = 150 \text{ steps/hour} \]
So, Mario walked 150 steps per hour.