I m making a Python program to do math figure out answers and so on but I m getting the syntaxerror unexpected character after line continuation character in python

Question

This is my code:

print("Length between sides: "+str((length*length)*2.6)+" \ 1.5 = "+str(((length*length)*2.6)\1.5)+" Units")

My problem is with \1.5 I have tried \1.5 but it doesn't work

Using python 2.7.2