Alright, let's work through 70468759 times 90728921 step by step
70468759 × 90728921 = 90728921 × (70468759)
+ 90728921 × 9 that results in 816560289
+ 90728921 × 50 that is equal 4536446050
+ 90728921 × 700 what gives us 63510244700
+ 90728921 × 8000 which equals 725831368000
+ 90728921 × 60000 that results in 5443735260000
+ 90728921 × 400000 producing 36291568400000
+ 90728921 × 0000000 that is equal 0
+ 90728921 × 70000000 which equals 6351024470000000

= 6393554468279039
