Alright, let's work through 4390 times 3995 step by step
4390 × 3995 = 3995 × (4390)
+ 3995 × 0 giving us 0
+ 3995 × 90 that equals 359550
+ 3995 × 300 what gives us 1198500
+ 3995 × 4000 yielding 15980000

= 17538050
