Alright, let's work through 1950 times 8109 step by step
1950 × 8109 = 8109 × (1950)
+ 8109 × 0 that is equal 0
+ 8109 × 50 that equals 405450
+ 8109 × 900 producing 7298100
+ 8109 × 1000 giving us 8109000

= 15812550
