Let's calculate 8389 x 8839
8389 × 8839 = 8839 × (8389)
+ 8839 × 9 that equals 79551
+ 8839 × 80 that results in 707120
+ 8839 × 300 which equals 2651700
+ 8839 × 8000 that is equal 70712000

= 74150371
