Average depth = Volume / Surface area
Substituting the given values, we get:
Average depth = 7.07271020 liters / 1.62525108 KM2
To convert liters to cubic kilometers, we divide by 10^15:
Average depth = 7.07271020 / (1.62525108 * 10^15) KM3
Average depth = 4.344 KM
Therefore, the average depth of the Pacific Ocean is approximately 4.344 kilometers.