Let's calculate 80120260 x 12102101
80120260 × 12102101 = 12102101 × (80120260)
+ 12102101 × 0 yielding 0
+ 12102101 × 60 giving us 726126060
+ 12102101 × 200 that equals 2420420200
+ 12102101 × 0000 that results in 0
+ 12102101 × 20000 producing 242042020000
+ 12102101 × 100000 yielding 1210210100000
+ 12102101 × 0000000 resulting in 0
+ 12102101 × 80000000 that equals 968168080000000

= 969623478666260
