No problem, we've got 64210800 and 78429887 to multiply
64210800 × 78429887 = 78429887 × (64210800)
+ 78429887 × 0 producing 0
+ 78429887 × 00 producing 0
+ 78429887 × 800 giving us 62743909600
+ 78429887 × 0000 giving us 0
+ 78429887 × 10000 what gives us 784298870000
+ 78429887 × 200000 yielding 15685977400000
+ 78429887 × 4000000 resulting in 313719548000000
+ 78429887 × 60000000 giving us 4705793220000000

= 5036045788179600
