Alright, let's work through 7887 times 6990 step by step
7887 × 6990 = 6990 × (7887)
+ 6990 × 7 that equals 48930
+ 6990 × 80 giving us 559200
+ 6990 × 800 that is equal 5592000
+ 6990 × 7000 producing 48930000

= 55130130
