on mine of cobblestone:
    cancel event
    add 1 to {%player%.cb}

command /assyuku <integer> <integer>:
    trigger:
        if arg-2*{%player%.cb} >= (64^arg-1)*arg-2:
            remove (64^arg-1)*arg-2 from {%player%.cb}
            loop arg-2 time:
                command "/menu grab %player% %arg-1%"