Alright, let's work through 7428 times 4015 step by step
7428 × 4015 = 4015 × (7428)
+ 4015 × 8 that is equal 32120
+ 4015 × 20 which equals 80300
+ 4015 × 400 that is equal 1606000
+ 4015 × 7000 yielding 28105000

= 29823420
