No problem, we've got 8420 and 8048 to multiply
8420 × 8048 = 8048 × (8420)
+ 8048 × 0 what gives us 0
+ 8048 × 20 that is equal 160960
+ 8048 × 400 that equals 3219200
+ 8048 × 8000 what gives us 64384000

= 67764160
