Alright, let's work through 7620 times 5256 step by step
7620 × 5256 = 5256 × (7620)
+ 5256 × 0 which equals 0
+ 5256 × 20 that results in 105120
+ 5256 × 600 giving us 3153600
+ 5256 × 7000 that is equal 36792000

= 40050720
