Alright, let's work through 7871 times 9099 step by step
7871 × 9099 = 9099 × (7871)
+ 9099 × 1 what gives us 9099
+ 9099 × 70 that equals 636930
+ 9099 × 800 yielding 7279200
+ 9099 × 7000 giving us 63693000

= 71618229
