Alright, let's work through 9131 times 800 step by step
9131 × 800 = 800 × (9131)
+ 800 × 1 that equals 800
+ 800 × 30 giving us 24000
+ 800 × 100 that is equal 80000
+ 800 × 9000 which equals 7200000

= 7304800
