Alright, let's work through 4342 times 3931 step by step
4342 × 3931 = 3931 × (4342)
+ 3931 × 2 producing 7862
+ 3931 × 40 that equals 157240
+ 3931 × 300 what gives us 1179300
+ 3931 × 4000 yielding 15724000

= 17068402
