We're going to solve 8420 multiplied by 9958
8420 × 9958 = 9958 × (8420)
+ 9958 × 0 giving us 0
+ 9958 × 20 that is equal 199160
+ 9958 × 400 that is equal 3983200
+ 9958 × 8000 producing 79664000

= 83846360
