calculator

import math
import time
print("OPERATIONS:\n+: plus\n-: minus\n* or x: times\n/: divided by\n^: to the power of\nlog: logarithm\nln: natural log (log e) (no second value)\nmod: modulo (remainder)\n")
number_1 = float(input("first number? "))
operation = input("operation? (use the operations above) ")
if operation == "ln":
    print("\n", math.log(number_1, math.e))
    time.sleep(1000000)
number_2 = float(input("second operation? "))
if operation == "+":
    print("\n", number_1 + number_2)
if operation == "-":
    print("\n", number_1 - number_2)
if operation == "*" or operation == "x":
    print("\n", number_1 * number_2)
if operation == "/":
    print("\n", number_1 / number_2)
if operation == "^":
    print("\n", pow(number_1, number_2))
if operation == "log":
    print("\n", math.log(number_1, number_2))
if operation == "mod":
    print("\n", number_1 % number_2)
time.sleep(1000000)