Alright, let's work through 1658 times 9980 step by step
1658 × 9980 = 9980 × (1658)
+ 9980 × 8 giving us 79840
+ 9980 × 50 giving us 499000
+ 9980 × 600 which equals 5988000
+ 9980 × 1000 yielding 9980000

= 16546840
