Let's calculate 80821974 x 47397378
80821974 × 47397378 = 47397378 × (80821974)
+ 47397378 × 4 which equals 189589512
+ 47397378 × 70 yielding 3317816460
+ 47397378 × 900 resulting in 42657640200
+ 47397378 × 1000 which equals 47397378000
+ 47397378 × 20000 giving us 947947560000
+ 47397378 × 800000 yielding 37917902400000
+ 47397378 × 0000000 giving us 0
+ 47397378 × 80000000 resulting in 3791790240000000

= 3830749652384172
