No problem, we've got 81759993 and 9967452 to multiply
81759993 × 9967452 = 9967452 × (81759993)
+ 9967452 × 3 which equals 29902356
+ 9967452 × 90 producing 897070680
+ 9967452 × 900 yielding 8970706800
+ 9967452 × 9000 which equals 89707068000
+ 9967452 × 50000 that results in 498372600000
+ 9967452 × 700000 yielding 6977216400000
+ 9967452 × 1000000 that is equal 9967452000000
+ 9967452 × 80000000 yielding 797396160000000

= 814938805747836
