Alright, let's work through 13426661 times 65379879 step by step
13426661 × 65379879 = 65379879 × (13426661)
+ 65379879 × 1 giving us 65379879
+ 65379879 × 60 resulting in 3922792740
+ 65379879 × 600 that equals 39227927400
+ 65379879 × 6000 that is equal 392279274000
+ 65379879 × 20000 yielding 1307597580000
+ 65379879 × 400000 resulting in 26151951600000
+ 65379879 × 3000000 what gives us 196139637000000
+ 65379879 × 10000000 producing 653798790000000

= 877833471554019
