Alright, let's work through 3998 times 7679 step by step
3998 × 7679 = 7679 × (3998)
+ 7679 × 8 giving us 61432
+ 7679 × 90 yielding 691110
+ 7679 × 900 what gives us 6911100
+ 7679 × 3000 that equals 23037000

= 30700642
