Alright, let's work through 88429540 times 61299648 step by step
88429540 × 61299648 = 61299648 × (88429540)
+ 61299648 × 0 resulting in 0
+ 61299648 × 40 producing 2451985920
+ 61299648 × 500 which equals 30649824000
+ 61299648 × 9000 what gives us 551696832000
+ 61299648 × 20000 what gives us 1225992960000
+ 61299648 × 400000 resulting in 24519859200000
+ 61299648 × 8000000 which equals 490397184000000
+ 61299648 × 80000000 producing 4903971840000000

= 5420699674801920
