Alright, let's work through 7815 times 6900 step by step
7815 × 6900 = 6900 × (7815)
+ 6900 × 5 that equals 34500
+ 6900 × 10 giving us 69000
+ 6900 × 800 giving us 5520000
+ 6900 × 7000 which equals 48300000

= 53923500
