Alright, let's work through 7987 times 5128 step by step
7987 × 5128 = 5128 × (7987)
+ 5128 × 7 giving us 35896
+ 5128 × 80 that is equal 410240
+ 5128 × 900 producing 4615200
+ 5128 × 7000 that results in 35896000

= 40957336
