Alright, let's work through 1657 times 1210 step by step
1657 × 1210 = 1210 × (1657)
+ 1210 × 7 which equals 8470
+ 1210 × 50 which equals 60500
+ 1210 × 600 producing 726000
+ 1210 × 1000 giving us 1210000

= 2004970
