Alright, let's work through 7020 times 2155 step by step
7020 × 2155 = 2155 × (7020)
+ 2155 × 0 that equals 0
+ 2155 × 20 what gives us 43100
+ 2155 × 000 which equals 0
+ 2155 × 7000 which equals 15085000

= 15128100
