No problem, we've got 7104 and 6420 to multiply
7104 × 6420 = 6420 × (7104)
+ 6420 × 4 what gives us 25680
+ 6420 × 00 resulting in 0
+ 6420 × 100 which equals 642000
+ 6420 × 7000 that is equal 44940000

= 45607680
