Let's calculate 7428 x 7639
7428 × 7639 = 7639 × (7428)
+ 7639 × 8 resulting in 61112
+ 7639 × 20 that is equal 152780
+ 7639 × 400 what gives us 3055600
+ 7639 × 7000 which equals 53473000

= 56742492
