Alright, let's work through 2415 times 3806 step by step
2415 × 3806 = 3806 × (2415)
+ 3806 × 5 resulting in 19030
+ 3806 × 10 giving us 38060
+ 3806 × 400 that is equal 1522400
+ 3806 × 2000 what gives us 7612000

= 9191490
