Alright, let's work through 1599 times 3578 step by step
1599 × 3578 = 3578 × (1599)
+ 3578 × 9 giving us 32202
+ 3578 × 90 what gives us 322020
+ 3578 × 500 that results in 1789000
+ 3578 × 1000 what gives us 3578000

= 5721222
