No problem, we've got 80869339 and 47863711 to multiply
80869339 × 47863711 = 47863711 × (80869339)
+ 47863711 × 9 resulting in 430773399
+ 47863711 × 30 what gives us 1435911330
+ 47863711 × 300 resulting in 14359113300
+ 47863711 × 9000 that equals 430773399000
+ 47863711 × 60000 that is equal 2871822660000
+ 47863711 × 800000 yielding 38290968800000
+ 47863711 × 0000000 that results in 0
+ 47863711 × 80000000 that results in 3829096880000000

= 3870706670657029
