Alright, let's work through 5640 times 9102 step by step
5640 × 9102 = 9102 × (5640)
+ 9102 × 0 giving us 0
+ 9102 × 40 that is equal 364080
+ 9102 × 600 that is equal 5461200
+ 9102 × 5000 which equals 45510000

= 51335280
