Alright, let's work through 8090 times 1047 step by step
8090 × 1047 = 1047 × (8090)
+ 1047 × 0 that results in 0
+ 1047 × 90 that is equal 94230
+ 1047 × 000 which equals 0
+ 1047 × 8000 that equals 8376000

= 8470230
