Alright, let's work through 54500489 times 76847477 step by step
54500489 × 76847477 = 76847477 × (54500489)
+ 76847477 × 9 what gives us 691627293
+ 76847477 × 80 giving us 6147798160
+ 76847477 × 400 giving us 30738990800
+ 76847477 × 0000 that results in 0
+ 76847477 × 00000 what gives us 0
+ 76847477 × 500000 yielding 38423738500000
+ 76847477 × 4000000 what gives us 307389908000000
+ 76847477 × 50000000 giving us 3842373850000000

= 4188225074916253
