Alright, let's work through 2407 times 6570 step by step
2407 × 6570 = 6570 × (2407)
+ 6570 × 7 that equals 45990
+ 6570 × 00 what gives us 0
+ 6570 × 400 what gives us 2628000
+ 6570 × 2000 producing 13140000

= 15813990
