Alright, let's work through 3639 times 8766 step by step
3639 × 8766 = 8766 × (3639)
+ 8766 × 9 that results in 78894
+ 8766 × 30 that is equal 262980
+ 8766 × 600 which equals 5259600
+ 8766 × 3000 that results in 26298000

= 31899474
