Alright, let's work through 4945 times 1187 step by step
4945 × 1187 = 1187 × (4945)
+ 1187 × 5 which equals 5935
+ 1187 × 40 that is equal 47480
+ 1187 × 900 giving us 1068300
+ 1187 × 4000 yielding 4748000

= 5869715
