No problem, we've got 80439559 and 20799446 to multiply
80439559 × 20799446 = 20799446 × (80439559)
+ 20799446 × 9 which equals 187195014
+ 20799446 × 50 that equals 1039972300
+ 20799446 × 500 that results in 10399723000
+ 20799446 × 9000 resulting in 187195014000
+ 20799446 × 30000 that is equal 623983380000
+ 20799446 × 400000 what gives us 8319778400000
+ 20799446 × 0000000 that results in 0
+ 20799446 × 80000000 producing 1663955680000000

= 1673098263684314
