def multiply(data_1, data_2):
    """ 
        Returns the multiplication of two fields, data_1 * data_2. Useful for xr.apply type operations
        Author: Dougie Squire
        Date: 27/06/2018
        
        Parameters
        ----------
        data_1 : array_like
            The first array
        data_2 : array_like 
            The second array
            
        Returns
        -------
        multiplication : array_like
            The multiplication of data_1 and data_2
            
        Examples
        --------
        >>> A = xr.DataArray(np.random.normal(size=(3,2)), coords=[('x', np.arange(3)), ('y', np.arange(2))])
        >>> B = xr.DataArray(np.random.normal(size=(3,2)), coords=[('x', np.arange(3)), ('y', np.arange(2))])
        >>> doppyo.utils.multiply(A,B)
        <xarray.DataArray (x: 3, y: 2)>
        array([[-0.219773,  0.235889],
               [-0.529542, -1.30342 ],
               [-1.048924,  0.20482 ]])
        Coordinates:
          * x        (x) int64 0 1 2
          * y        (y) int64 0 1
    """
    return data_1 * data_2
