Alright, let's work through 81609327 times 49326646 step by step
81609327 × 49326646 = 49326646 × (81609327)
+ 49326646 × 7 that results in 345286522
+ 49326646 × 20 what gives us 986532920
+ 49326646 × 300 giving us 14797993800
+ 49326646 × 9000 resulting in 443939814000
+ 49326646 × 00000 yielding 0
+ 49326646 × 600000 which equals 29595987600000
+ 49326646 × 1000000 yielding 49326646000000
+ 49326646 × 80000000 that results in 3946131680000000

= 4025514383227242
