Alright, let's work through 4390 times 9711 step by step
4390 × 9711 = 9711 × (4390)
+ 9711 × 0 resulting in 0
+ 9711 × 90 what gives us 873990
+ 9711 × 300 that is equal 2913300
+ 9711 × 4000 that equals 38844000

= 42631290
