Alright, let's work through 6404 times 1234 step by step
6404 × 1234 = 1234 × (6404)
+ 1234 × 4 that is equal 4936
+ 1234 × 00 that is equal 0
+ 1234 × 400 that results in 493600
+ 1234 × 6000 giving us 7404000

= 7902536
