Alright, let's work through 21026859 times 61340709 step by step
21026859 × 61340709 = 61340709 × (21026859)
+ 61340709 × 9 that results in 552066381
+ 61340709 × 50 yielding 3067035450
+ 61340709 × 800 that equals 49072567200
+ 61340709 × 6000 yielding 368044254000
+ 61340709 × 20000 which equals 1226814180000
+ 61340709 × 000000 that is equal 0
+ 61340709 × 1000000 that results in 61340709000000
+ 61340709 × 20000000 that equals 1226814180000000

= 1289802439103031
