<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read_mm_uic3(fd, byte_order, dtype, count):
 """Read MM_UIC3 tag from file and return as dictionary."""

    t = numpy.fromfile(fd, byte_order+'I', 2*count)
    return {'wavelengths': t[0::2] // t[1::2]}