No problem, we've got 18085345 and 89659355 to multiply
18085345 × 89659355 = 89659355 × (18085345)
+ 89659355 × 5 that is equal 448296775
+ 89659355 × 40 producing 3586374200
+ 89659355 × 300 what gives us 26897806500
+ 89659355 × 5000 that is equal 448296775000
+ 89659355 × 80000 which equals 7172748400000
+ 89659355 × 000000 which equals 0
+ 89659355 × 8000000 giving us 717274840000000
+ 89659355 × 10000000 resulting in 896593550000000

= 1621520367652475
