Alright, let's work through 7640 times 1742 step by step
7640 × 1742 = 1742 × (7640)
+ 1742 × 0 that is equal 0
+ 1742 × 40 that is equal 69680
+ 1742 × 600 producing 1045200
+ 1742 × 7000 that results in 12194000

= 13308880
