Alright, let's work through 5387 times 3099 step by step
5387 × 3099 = 3099 × (5387)
+ 3099 × 7 producing 21693
+ 3099 × 80 giving us 247920
+ 3099 × 300 that equals 929700
+ 3099 × 5000 which equals 15495000

= 16694313
