def get_data(source_data: list[list[float]]) -> list[list[float]]:
    data_lists: list[list[float]] = []
    for data in source_data:
        for i, el in enumerate(data):
            if len(data_lists) < i + 1:
                data_lists.append([])
            data_lists[i].append(float(el))
    return data_lists