Alright, let's work through 4042 times 1599 step by step
4042 × 1599 = 1599 × (4042)
+ 1599 × 2 which equals 3198
+ 1599 × 40 what gives us 63960
+ 1599 × 000 that is equal 0
+ 1599 × 4000 that is equal 6396000

= 6463158
