Alright, let's work through 64048789 times 54058376 step by step
64048789 × 54058376 = 54058376 × (64048789)
+ 54058376 × 9 that results in 486525384
+ 54058376 × 80 that equals 4324670080
+ 54058376 × 700 which equals 37840863200
+ 54058376 × 8000 what gives us 432467008000
+ 54058376 × 40000 that results in 2162335040000
+ 54058376 × 000000 that equals 0
+ 54058376 × 4000000 resulting in 216233504000000
+ 54058376 × 60000000 what gives us 3243502560000000

= 3462373518106664
