Alright, let's work through 1215 times 5401 step by step
1215 × 5401 = 5401 × (1215)
+ 5401 × 5 producing 27005
+ 5401 × 10 what gives us 54010
+ 5401 × 200 producing 1080200
+ 5401 × 1000 that equals 5401000

= 6562215
