Total Marbles Calculation

Tom has 3 jars of marbles. Each jar contains 9 marbles. How many marbles does Tom have in total?

To find the total number of marbles, multiply the number of jars by the number of marbles in each jar. So, you would calculate this as:

$$ ext{Total Marbles} = ext{Number of Jars} imes ext{Marbles per Jar}$$