Let's calculate 6445 x 2673
6445 × 2673 = 2673 × (6445)
+ 2673 × 5 that equals 13365
+ 2673 × 40 that equals 106920
+ 2673 × 400 that results in 1069200
+ 2673 × 6000 that equals 16038000

= 17227485
