Alright, let's work through 1604 times 6316 step by step
1604 × 6316 = 6316 × (1604)
+ 6316 × 4 that equals 25264
+ 6316 × 00 which equals 0
+ 6316 × 600 resulting in 3789600
+ 6316 × 1000 producing 6316000

= 10130864
