The Multiply Delta Time by an F-Floating Scalar routine
    multiplies a delta time by an F-floating scalar.
    Format
      LIB$MULTF_DELTA_TIME  multiplier ,delta-time
1 – Returns
    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value
2 – Arguments
 multiplier
    OpenVMS usage:floating_point
    type:         F_floating
    access:       read only
    mechanism:    by reference
    The value by which LIB$MULTF_DELTA_TIME multiplies the delta
    time. The multiplier argument is the address of an F-floating
    value containing the scalar. If multiplier is negative, the
    absolute value of multiplier is used.
 delta-time
    OpenVMS usage:date_time
    type:         quadword (unsigned)
    access:       modify
    mechanism:    by reference
    The delta time to be multiplied. The delta-time argument is
    the address of an unsigned quadword containing the number to
    be multiplied. The initial delta-time argument must be greater
    than 0. After LIB$MULTF_DELTA_TIME performs the multiplication,
    the result is returned to delta-time. (The original delta-time
    value is overwritten.)