Alright, let's work through 7152 times 420 step by step
7152 × 420 = 420 × (7152)
+ 420 × 2 giving us 840
+ 420 × 50 which equals 21000
+ 420 × 100 that is equal 42000
+ 420 × 7000 that equals 2940000

= 3003840
