Alright, let's work through 9231 times 8131 step by step
9231 × 8131 = 8131 × (9231)
+ 8131 × 1 producing 8131
+ 8131 × 30 that is equal 243930
+ 8131 × 200 that equals 1626200
+ 8131 × 9000 yielding 73179000

= 75057261
