Let's calculate 8731 x 8131
8731 × 8131 = 8131 × (8731)
+ 8131 × 1 which equals 8131
+ 8131 × 30 giving us 243930
+ 8131 × 700 that results in 5691700
+ 8131 × 8000 that results in 65048000

= 70991761
