Alright, let's work through 1907 times 8100 step by step
1907 × 8100 = 8100 × (1907)
+ 8100 × 7 yielding 56700
+ 8100 × 00 which equals 0
+ 8100 × 900 yielding 7290000
+ 8100 × 1000 that equals 8100000

= 15446700
