Alright, let's work through 72189381 times 93912081 step by step
72189381 × 93912081 = 93912081 × (72189381)
+ 93912081 × 1 that equals 93912081
+ 93912081 × 80 resulting in 7512966480
+ 93912081 × 300 that is equal 28173624300
+ 93912081 × 9000 which equals 845208729000
+ 93912081 × 80000 producing 7512966480000
+ 93912081 × 100000 giving us 9391208100000
+ 93912081 × 2000000 producing 187824162000000
+ 93912081 × 70000000 what gives us 6573845670000000

= 6779454995811861
