Alright, let's work through 78406890 times 28690948 step by step
78406890 × 28690948 = 28690948 × (78406890)
+ 28690948 × 0 what gives us 0
+ 28690948 × 90 which equals 2582185320
+ 28690948 × 800 which equals 22952758400
+ 28690948 × 6000 giving us 172145688000
+ 28690948 × 00000 resulting in 0
+ 28690948 × 400000 what gives us 11476379200000
+ 28690948 × 8000000 what gives us 229527584000000
+ 28690948 × 70000000 which equals 2008366360000000

= 2249568003831720
