Alright, let's work through 2148 times 1801 step by step
2148 × 1801 = 1801 × (2148)
+ 1801 × 8 that results in 14408
+ 1801 × 40 what gives us 72040
+ 1801 × 100 producing 180100
+ 1801 × 2000 what gives us 3602000

= 3868548
