Alright, let's work through 3820 times 4500 step by step
3820 × 4500 = 4500 × (3820)
+ 4500 × 0 that equals 0
+ 4500 × 20 what gives us 90000
+ 4500 × 800 that equals 3600000
+ 4500 × 3000 that equals 13500000

= 17190000
