Alright, let's work through 4156 times 7409 step by step
4156 × 7409 = 7409 × (4156)
+ 7409 × 6 what gives us 44454
+ 7409 × 50 which equals 370450
+ 7409 × 100 that equals 740900
+ 7409 × 4000 resulting in 29636000

= 30791804
