No problem, we've got 83852568 and 64473357 to multiply
83852568 × 64473357 = 64473357 × (83852568)
+ 64473357 × 8 that equals 515786856
+ 64473357 × 60 which equals 3868401420
+ 64473357 × 500 which equals 32236678500
+ 64473357 × 2000 yielding 128946714000
+ 64473357 × 50000 what gives us 3223667850000
+ 64473357 × 800000 that equals 51578685600000
+ 64473357 × 3000000 that equals 193420071000000
+ 64473357 × 80000000 resulting in 5157868560000000

= 5406256552030776
