Alright, let's work through 4487 times 189 step by step
4487 × 189 = 189 × (4487)
+ 189 × 7 that is equal 1323
+ 189 × 80 that is equal 15120
+ 189 × 400 yielding 75600
+ 189 × 4000 that equals 756000

= 848043
