Alright, let's work through 55109971 times 80253521 step by step
55109971 × 80253521 = 80253521 × (55109971)
+ 80253521 × 1 giving us 80253521
+ 80253521 × 70 resulting in 5617746470
+ 80253521 × 900 yielding 72228168900
+ 80253521 × 9000 that results in 722281689000
+ 80253521 × 00000 yielding 0
+ 80253521 × 100000 what gives us 8025352100000
+ 80253521 × 5000000 producing 401267605000000
+ 80253521 × 50000000 that is equal 4012676050000000

= 4422769214957891
