No problem, we've got 72723432 and 72597792 to multiply
72723432 × 72597792 = 72597792 × (72723432)
+ 72597792 × 2 which equals 145195584
+ 72597792 × 30 what gives us 2177933760
+ 72597792 × 400 yielding 29039116800
+ 72597792 × 3000 that equals 217793376000
+ 72597792 × 20000 resulting in 1451955840000
+ 72597792 × 700000 giving us 50818454400000
+ 72597792 × 2000000 that is equal 145195584000000
+ 72597792 × 70000000 that equals 5081845440000000

= 5279560589862144
