Alright, let's work through 1521 times 801 step by step
1521 × 801 = 801 × (1521)
+ 801 × 1 what gives us 801
+ 801 × 20 that results in 16020
+ 801 × 500 that equals 400500
+ 801 × 1000 yielding 801000

= 1218321
