Let's calculate 3872 x 9978
3872 × 9978 = 9978 × (3872)
+ 9978 × 2 that results in 19956
+ 9978 × 70 which equals 698460
+ 9978 × 800 resulting in 7982400
+ 9978 × 3000 that results in 29934000

= 38634816
