def sci_notation(number, sig_fig=2):
    """ Convert a number to scientific notation for pasting into Latex.
        e.g. 4.32342342e-10 --> 4.3 * 10^{-10}
    """
    ret_string = "{0:.{1:d}e}".format(number, sig_fig)
    a, b = ret_string.split("e")
    # remove leading "+" and strip leading zeros
    b = int(b)
    return f"${a} \\times 10^{{{b}}}$"