No problem, we've got 99887862 and 18712909 to multiply
99887862 × 18712909 = 18712909 × (99887862)
+ 18712909 × 2 yielding 37425818
+ 18712909 × 60 which equals 1122774540
+ 18712909 × 800 that equals 14970327200
+ 18712909 × 7000 that is equal 130990363000
+ 18712909 × 80000 that results in 1497032720000
+ 18712909 × 800000 resulting in 14970327200000
+ 18712909 × 9000000 giving us 168416181000000
+ 18712909 × 90000000 which equals 1684161810000000

= 1869192471810558
