No problem, we've got 81780799 and 81019225 to multiply
81780799 × 81019225 = 81019225 × (81780799)
+ 81019225 × 9 that results in 729173025
+ 81019225 × 90 resulting in 7291730250
+ 81019225 × 700 yielding 56713457500
+ 81019225 × 0000 that results in 0
+ 81019225 × 80000 that equals 6481538000000
+ 81019225 × 700000 giving us 56713457500000
+ 81019225 × 1000000 yielding 81019225000000
+ 81019225 × 80000000 that results in 6481538000000000

= 6625816954860775
