code: import os
  
  os.environ["LANGCHAIN_TRACING"] = "true"
  
  from langchain import OpenAI
  from langchain.agents import initialize_agent, AgentType
  from langchain.llms import OpenAI
  from langchain.agents import initialize_agent, Tool
  from langchain.agents import AgentType
  
  def multiplier(a, b):
      return a / b
  
  
  def parsing_multiplier(string):
      a, b = string.split(",")
      return multiplier(int(a), int(b))
  
  llm = OpenAI(temperature=0)
  tools = [
      Tool(
          name="Multiplier",
          func=parsing_multiplier,
          description="useful for when you need to multiply two numbers together. The input to this tool should be a comma separated list of numbers of length two, representing the two numbers you want to multiply together. For example, `1,2` would be the input if you wanted to multiply 1 by 2.",
      )
  ]
  agent = initialize_agent(
      tools, llm, agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION, verbose=True
  )
  
  agent.run("3 times four?")
  
apis: langchain.llms.OpenAI langchain.agents.initialize_agent langchain.agents.Tool
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