Alright, let's work through 4638 times 4072 step by step
4638 × 4072 = 4072 × (4638)
+ 4072 × 8 that equals 32576
+ 4072 × 30 what gives us 122160
+ 4072 × 600 which equals 2443200
+ 4072 × 4000 giving us 16288000

= 18885936
