### Source: Coprocessor Conflagration

Part 1:Create a variation of the previous DuetVM with only the following four instructions:

`set X Y`

sets register`X`

to`Y`

`sub X Y`

set register`X`

to`X - Y`

`mul X Y`

sets register`X`

to`X * Y`

`jnz X Y`

jumps with an offset of the value of`Y`

, iff`X`

is not equal to zeroIf you run the given program, how many times is

`mul`

invoked?