 P: DUP  
    LOAD 1
    DUP  
    LOAD 1
    DUP  
    ROLL 1
P1: JZ   P2
    SUB  
    DUP  
    MUL  
    DUP  
    LOAD 1
    ROLL 3
    JMP  P1
P2: POP  
    POP  
    POP  
    POP  
    RET  
