Answer: The number of bars is 63.
Step-by-step explanation: Given that Brittany bakes fruit bars in a pan.
The dimensions of the pan are

So, the volume of the pan is given by

The dimension of each fruit bar are given by

So, the volume of each fruit bar is given by

Therefore, the number of fruit bars that Brittany cuts from the pan will be

Thus, the total number of fruit bars is 63.