Alright, let's work through 1642 times 7392 step by step
1642 × 7392 = 7392 × (1642)
+ 7392 × 2 producing 14784
+ 7392 × 40 resulting in 295680
+ 7392 × 600 yielding 4435200
+ 7392 × 1000 giving us 7392000

= 12137664
