We're going to solve 3872 multiplied by 2072
3872 × 2072 = 2072 × (3872)
+ 2072 × 2 that equals 4144
+ 2072 × 70 giving us 145040
+ 2072 × 800 resulting in 1657600
+ 2072 × 3000 that results in 6216000

= 8022784
