Alright, let's work through 5404 times 3644 step by step
5404 × 3644 = 3644 × (5404)
+ 3644 × 4 which equals 14576
+ 3644 × 00 which equals 0
+ 3644 × 400 what gives us 1457600
+ 3644 × 5000 yielding 18220000

= 19692176
