Alright, let's work through 54357930 times 53121108 step by step
54357930 × 53121108 = 53121108 × (54357930)
+ 53121108 × 0 that results in 0
+ 53121108 × 30 which equals 1593633240
+ 53121108 × 900 that equals 47808997200
+ 53121108 × 7000 giving us 371847756000
+ 53121108 × 50000 resulting in 2656055400000
+ 53121108 × 300000 producing 15936332400000
+ 53121108 × 4000000 that equals 212484432000000
+ 53121108 × 50000000 yielding 2656055400000000

= 2887553470186440
