Alright, let's work through 66408978 times 79450688 step by step
66408978 × 79450688 = 79450688 × (66408978)
+ 79450688 × 8 resulting in 635605504
+ 79450688 × 70 what gives us 5561548160
+ 79450688 × 900 which equals 71505619200
+ 79450688 × 8000 that is equal 635605504000
+ 79450688 × 00000 giving us 0
+ 79450688 × 400000 that results in 31780275200000
+ 79450688 × 6000000 yielding 476704128000000
+ 79450688 × 60000000 that results in 4767041280000000

= 5276238991476864
