No problem, we've got 8424 and 8355 to multiply
8424 × 8355 = 8355 × (8424)
+ 8355 × 4 which equals 33420
+ 8355 × 20 that is equal 167100
+ 8355 × 400 that is equal 3342000
+ 8355 × 8000 which equals 66840000

= 70382520
