Alright, let's work through 1890 times 6447 step by step
1890 × 6447 = 6447 × (1890)
+ 6447 × 0 yielding 0
+ 6447 × 90 what gives us 580230
+ 6447 × 800 that equals 5157600
+ 6447 × 1000 which equals 6447000

= 12184830
