Alright, let's work through 7991 times 1030 step by step
7991 × 1030 = 1030 × (7991)
+ 1030 × 1 that results in 1030
+ 1030 × 90 that is equal 92700
+ 1030 × 900 that equals 927000
+ 1030 × 7000 resulting in 7210000

= 8230730
