What does the following algorithm do$?$

$1.$ start

$2.$ store $7$ in A

$3.$ store $0$ in B

$4.$ add A to B and store it in B

$5.$ decrement $($i$.$e subtract $1$ from$)$ the value stored in A

$6.$ if A$>0$ go to step $4$; otherwise, go to the next step

$7.$ show B to the end$-$user

$8.$ stop