Alright, let's work through 7895 times 78 step by step
7895 × 78 = 78 × (7895)
+ 78 × 5 giving us 390
+ 78 × 90 that results in 7020
+ 78 × 800 what gives us 62400
+ 78 × 7000 what gives us 546000

= 615810
