Alright, let's work through 77978647 times 97103462 step by step
77978647 × 97103462 = 97103462 × (77978647)
+ 97103462 × 7 giving us 679724234
+ 97103462 × 40 that equals 3884138480
+ 97103462 × 600 giving us 58262077200
+ 97103462 × 8000 what gives us 776827696000
+ 97103462 × 70000 that equals 6797242340000
+ 97103462 × 900000 that results in 87393115800000
+ 97103462 × 7000000 producing 679724234000000
+ 97103462 × 70000000 giving us 6797242340000000

= 7571996585775914
