No problem, we've got 7900 and 8161 to multiply
7900 × 8161 = 8161 × (7900)
+ 8161 × 0 which equals 0
+ 8161 × 00 giving us 0
+ 8161 × 900 that equals 7344900
+ 8161 × 7000 producing 57127000

= 64471900
