No problem, we've got 8439 and 7969 to multiply
8439 × 7969 = 7969 × (8439)
+ 7969 × 9 that results in 71721
+ 7969 × 30 that equals 239070
+ 7969 × 400 what gives us 3187600
+ 7969 × 8000 that is equal 63752000

= 67250391
