No problem, we've got 81573427 and 55142500 to multiply
81573427 × 55142500 = 55142500 × (81573427)
+ 55142500 × 7 which equals 385997500
+ 55142500 × 20 yielding 1102850000
+ 55142500 × 400 which equals 22057000000
+ 55142500 × 3000 that equals 165427500000
+ 55142500 × 70000 giving us 3859975000000
+ 55142500 × 500000 that equals 27571250000000
+ 55142500 × 1000000 that results in 55142500000000
+ 55142500 × 80000000 giving us 4411400000000000

= 4498162698347500
