No problem, we've got 83745665 and 80388647 to multiply
83745665 × 80388647 = 80388647 × (83745665)
+ 80388647 × 5 yielding 401943235
+ 80388647 × 60 giving us 4823318820
+ 80388647 × 600 resulting in 48233188200
+ 80388647 × 5000 giving us 401943235000
+ 80388647 × 40000 producing 3215545880000
+ 80388647 × 700000 which equals 56272052900000
+ 80388647 × 3000000 that results in 241165941000000
+ 80388647 × 80000000 resulting in 6431091760000000

= 6732200701465255
