Alright, let's work through 3800 times 7991 step by step
3800 × 7991 = 7991 × (3800)
+ 7991 × 0 that is equal 0
+ 7991 × 00 yielding 0
+ 7991 × 800 yielding 6392800
+ 7991 × 3000 resulting in 23973000

= 30365800
