Alright, let's work through 3415 times 8472 step by step
3415 × 8472 = 8472 × (3415)
+ 8472 × 5 that results in 42360
+ 8472 × 10 what gives us 84720
+ 8472 × 400 that equals 3388800
+ 8472 × 3000 that equals 25416000

= 28931880
