Alright, let's work through 3462 times 5820 step by step
3462 × 5820 = 5820 × (3462)
+ 5820 × 2 giving us 11640
+ 5820 × 60 giving us 349200
+ 5820 × 400 that equals 2328000
+ 5820 × 3000 resulting in 17460000

= 20148840
