Alright, let's work through 53990498 times 54159734 step by step
53990498 × 54159734 = 54159734 × (53990498)
+ 54159734 × 8 producing 433277872
+ 54159734 × 90 giving us 4874376060
+ 54159734 × 400 yielding 21663893600
+ 54159734 × 0000 producing 0
+ 54159734 × 90000 that results in 4874376060000
+ 54159734 × 900000 that equals 48743760600000
+ 54159734 × 3000000 producing 162479202000000
+ 54159734 × 50000000 that equals 2707986700000000

= 2924111010207532
