Alright, let's work through 1621 times 102 step by step
1621 × 102 = 102 × (1621)
+ 102 × 1 giving us 102
+ 102 × 20 which equals 2040
+ 102 × 600 which equals 61200
+ 102 × 1000 that results in 102000

= 165342
