Alright, let's work through 6311 times 8412 step by step
6311 × 8412 = 8412 × (6311)
+ 8412 × 1 producing 8412
+ 8412 × 10 resulting in 84120
+ 8412 × 300 giving us 2523600
+ 8412 × 6000 that results in 50472000

= 53088132
