Alright, let's work through 64128913 times 54166117 step by step
64128913 × 54166117 = 54166117 × (64128913)
+ 54166117 × 3 yielding 162498351
+ 54166117 × 10 which equals 541661170
+ 54166117 × 900 producing 48749505300
+ 54166117 × 8000 that equals 433328936000
+ 54166117 × 20000 resulting in 1083322340000
+ 54166117 × 100000 producing 5416611700000
+ 54166117 × 4000000 giving us 216664468000000
+ 54166117 × 60000000 yielding 3249967020000000

= 3473614204640821
