Alright, let's work through 8731 times 2390 step by step
8731 × 2390 = 2390 × (8731)
+ 2390 × 1 giving us 2390
+ 2390 × 30 that results in 71700
+ 2390 × 700 giving us 1673000
+ 2390 × 8000 that is equal 19120000

= 20867090
