Alright, let's work through 1521 times 5855 step by step
1521 × 5855 = 5855 × (1521)
+ 5855 × 1 what gives us 5855
+ 5855 × 20 giving us 117100
+ 5855 × 500 which equals 2927500
+ 5855 × 1000 giving us 5855000

= 8905455
