No problem, we've got 7815 and 3948 to multiply
7815 × 3948 = 3948 × (7815)
+ 3948 × 5 that equals 19740
+ 3948 × 10 what gives us 39480
+ 3948 × 800 what gives us 3158400
+ 3948 × 7000 yielding 27636000

= 30853620
