Alright, let's work through 1601 times 3536 step by step
1601 × 3536 = 3536 × (1601)
+ 3536 × 1 that is equal 3536
+ 3536 × 00 which equals 0
+ 3536 × 600 resulting in 2121600
+ 3536 × 1000 yielding 3536000

= 5661136
