Alright, let's work through 3958 times 7170 step by step
3958 × 7170 = 7170 × (3958)
+ 7170 × 8 resulting in 57360
+ 7170 × 50 that is equal 358500
+ 7170 × 900 what gives us 6453000
+ 7170 × 3000 what gives us 21510000

= 28378860
