Python 101: 2.15 challenge

print("Hello there.  My name is Marvin and I'm your personal bot.")
user_name=input("What's your name?")
print("Hello " + user_name + " and welcome.")
command = input("What can I help you with?")
if command == "add" or command == "subtract" or command == "multiply" or command == "divide" :
    print("Let's " + command + " some numbers.")
    input1=input("Number1 > ")
    input2=input("Number2 > ")
    number1=int(input1)
    number2=int(input2)
    result=number1+number2
    output=str(result)
    print(input1 + "+" + input2 + "=" + output)
    print("Now we can try a multiplication.")
    input3=input("Number3 > ")
    input4=input("Number4 > ")
    number3=int(input3)
    number4=int(input4)
    result=number3*number4
    output=str(result)
    print(input3 + "*" + input4 + "=" + output)
    print("And now a division.")
    input5=input("Number5 > ")
    input6=input("Number6 > ")
    number5=int(input5)
    number6=int(input6)
    result=number5/number6
    output=str(result)
    print(input5 + "/" + input6 + "=" + output)
    print("Finally let's try finding the area of a rectangle. You will need to give me the lengths of the two different sides.")
    input7=input("Number7 > ")
    input8=input("Number8 > ")
    number7=float(input7)
    number8=float(input8)
    result=number7*number8
    output=str(result)
    print(input7 + "*" + input8 + "=" + output + " sq.m")