Alright, let's work through 1245 times 815 step by step
1245 × 815 = 815 × (1245)
+ 815 × 5 which equals 4075
+ 815 × 40 yielding 32600
+ 815 × 200 what gives us 163000
+ 815 × 1000 giving us 815000

= 1014675
