Alright, let's work through 26085839 times 51396857 step by step
26085839 × 51396857 = 51396857 × (26085839)
+ 51396857 × 9 which equals 462571713
+ 51396857 × 30 which equals 1541905710
+ 51396857 × 800 what gives us 41117485600
+ 51396857 × 5000 that equals 256984285000
+ 51396857 × 80000 that is equal 4111748560000
+ 51396857 × 000000 that is equal 0
+ 51396857 × 6000000 resulting in 308381142000000
+ 51396857 × 20000000 yielding 1027937140000000

= 1340730136808023
