text: import tensorflow as tf 
  
  x = tf.constant([100,200,300],name ="x")
  y = tf.constant([1,2,3],name ="y")
  
  sum_x = tf.reduce_sum(x,name ="sum_x")
  prod_y = tf.reduce_prod(y,name="prod_y")
  
  final_div = tf.div(sum_x,prod_y,name="final_div")
  final_mean = tf.reduce_mean([sum_x,prod_y],name="final_mean") 
  
  sess = tf.Session()
  
  print("x: ",sess.run(x))
  print("y: ",sess.run(y))
  
  print("sum(x): ",sess.run(sum_x))
  print("prod_y: ",sess.run(prod_y))
  print("sum_x/prod_y: ",sess.run(final_div))
  print("mean: ",sess.run(final_mean))
  
  writer = tf.summary.FileWriter('./two_board',sess.graph)
  writer.close()
  sess.close() 
  
   
   