Alright, let's work through 3984 times 1109 step by step
3984 × 1109 = 1109 × (3984)
+ 1109 × 4 which equals 4436
+ 1109 × 80 that equals 88720
+ 1109 × 900 giving us 998100
+ 1109 × 3000 that is equal 3327000

= 4418256
