No problem, we've got 6443355 and 13484408 to multiply
6443355 × 13484408 = 13484408 × (6443355)
+ 13484408 × 5 that equals 67422040
+ 13484408 × 50 giving us 674220400
+ 13484408 × 300 what gives us 4045322400
+ 13484408 × 3000 giving us 40453224000
+ 13484408 × 40000 that equals 539376320000
+ 13484408 × 400000 which equals 5393763200000
+ 13484408 × 6000000 resulting in 80906448000000

= 86884827708840
