Alright, let's work through 3947 times 1902 step by step
3947 × 1902 = 1902 × (3947)
+ 1902 × 7 that is equal 13314
+ 1902 × 40 what gives us 76080
+ 1902 × 900 that is equal 1711800
+ 1902 × 3000 that equals 5706000

= 7507194
