Alright, let's work through 1407 times 4080 step by step
1407 × 4080 = 4080 × (1407)
+ 4080 × 7 that equals 28560
+ 4080 × 00 producing 0
+ 4080 × 400 which equals 1632000
+ 4080 × 1000 producing 4080000

= 5740560
