Alright, let's work through 3489 times 1158 step by step
3489 × 1158 = 1158 × (3489)
+ 1158 × 9 yielding 10422
+ 1158 × 80 which equals 92640
+ 1158 × 400 resulting in 463200
+ 1158 × 3000 that results in 3474000

= 4040262
