code: def convert_datetime_to_floats(x):
      first = int(x.iloc[0].value * 1e-9)
      x = pd.to_numeric(x).astype(np.float64).values
      dividend = find_dividend_by_unit(first)
      x *= 1e-9 / dividend
      return x
  
file_path: featuretools/featuretools/utils/time_utils.py
imports: from datetime import datetime, timedelta
  import numpy
  import pandas
label_desc: Use image node_id 3 for calling a global function with example usage: convert_datetime_to_floats(x) and returns: x