Alright, let's work through 80303388 times 51741621 step by step
80303388 × 51741621 = 51741621 × (80303388)
+ 51741621 × 8 that equals 413932968
+ 51741621 × 80 yielding 4139329680
+ 51741621 × 300 producing 15522486300
+ 51741621 × 3000 which equals 155224863000
+ 51741621 × 00000 resulting in 0
+ 51741621 × 300000 resulting in 15522486300000
+ 51741621 × 0000000 yielding 0
+ 51741621 × 80000000 that results in 4139329680000000

= 4155027466911948
