No problem, we've got 3658 and 1000 to multiply
3658 × 1000 = 1000 × (3658)
+ 1000 × 8 that equals 8000
+ 1000 × 50 which equals 50000
+ 1000 × 600 that equals 600000
+ 1000 × 3000 that is equal 3000000

= 3658000
