No problem, we've got 20121226 and 6265512 to multiply
20121226 × 6265512 = 6265512 × (20121226)
+ 6265512 × 6 producing 37593072
+ 6265512 × 20 producing 125310240
+ 6265512 × 200 which equals 1253102400
+ 6265512 × 1000 that results in 6265512000
+ 6265512 × 20000 producing 125310240000
+ 6265512 × 100000 resulting in 626551200000
+ 6265512 × 0000000 that equals 0
+ 6265512 × 20000000 that equals 125310240000000

= 126069782957712
