Alright, let's work through 1801 times 8437 step by step
1801 × 8437 = 8437 × (1801)
+ 8437 × 1 that results in 8437
+ 8437 × 00 which equals 0
+ 8437 × 800 which equals 6749600
+ 8437 × 1000 that results in 8437000

= 15195037
