Alright, let's work through 1658 times 6489 step by step
1658 × 6489 = 6489 × (1658)
+ 6489 × 8 which equals 51912
+ 6489 × 50 resulting in 324450
+ 6489 × 600 which equals 3893400
+ 6489 × 1000 producing 6489000

= 10758762
