Alright, let's work through 3524 times 7902 step by step
3524 × 7902 = 7902 × (3524)
+ 7902 × 4 which equals 31608
+ 7902 × 20 that is equal 158040
+ 7902 × 500 that results in 3951000
+ 7902 × 3000 giving us 23706000

= 27846648
