Alright, let's work through 55290380 times 74640081 step by step
55290380 × 74640081 = 74640081 × (55290380)
+ 74640081 × 0 resulting in 0
+ 74640081 × 80 which equals 5971206480
+ 74640081 × 300 that results in 22392024300
+ 74640081 × 0000 that results in 0
+ 74640081 × 90000 what gives us 6717607290000
+ 74640081 × 200000 which equals 14928016200000
+ 74640081 × 5000000 that equals 373200405000000
+ 74640081 × 50000000 that results in 3732004050000000

= 4126878441720780
