Alright, let's work through 54123914 times 77817378 step by step
54123914 × 77817378 = 77817378 × (54123914)
+ 77817378 × 4 that is equal 311269512
+ 77817378 × 10 that results in 778173780
+ 77817378 × 900 giving us 70035640200
+ 77817378 × 3000 what gives us 233452134000
+ 77817378 × 20000 giving us 1556347560000
+ 77817378 × 100000 which equals 7781737800000
+ 77817378 × 4000000 that equals 311269512000000
+ 77817378 × 50000000 which equals 3890868900000000

= 4211781074577492
