Alright, let's work through 8221 times 8425 step by step
8221 × 8425 = 8425 × (8221)
+ 8425 × 1 that equals 8425
+ 8425 × 20 that equals 168500
+ 8425 × 200 which equals 1685000
+ 8425 × 8000 what gives us 67400000

= 69261925
