We're going to solve 4392 multiplied by 7821
4392 × 7821 = 7821 × (4392)
+ 7821 × 2 producing 15642
+ 7821 × 90 that results in 703890
+ 7821 × 300 giving us 2346300
+ 7821 × 4000 which equals 31284000

= 34349832
