code: def num_to_string(num, precision=2):
      if num // 10**9 > 0:
          return str(round(num / 10.0**9, precision)) + " G"
      elif num // 10**6 > 0:
          return str(round(num / 10.0**6, precision)) + " M"
      elif num // 10**3 > 0:
          return str(round(num / 10.0**3, precision)) + " K"
      else:
          return str(num)
  
imports: import time
  import torch
  import torch.nn
  import torch.nn.functional
  from functools import partial
  from typing import List, Optional
  from collections import OrderedDict
  import numpy
label_desc: Use image node_id 36 for calling a global function with example usage: num_to_string(num, precision) and returns: unknown, unknown, unknown, str