simple string & input problem

[kungshamji]

im building a bmi calculator, very new to programming and i have this problem
[spoiler]

[python][b]name = input("what's your name ")

height = input ("what's your height " + name )
print (height)

weight = input ("what's your weight" + name)
print (weight)

[color=#2ECC71]bmi = weight /(height**2)[/color]
print(bmi)

Problem:: when i write my input there is no space in between the input (exampel "what's your name?Joey tribbiani"

and lastly, the biggest problem is that i can't run my code. (line bmi=weigt/(heigt**2)...) i don't know why.
this is my first real (problem im trying to solve) help appreciated.