Python supports a string-by-number multiplication (but not the other way around!). Use hello to get the "hellohellohellohellohellohellohellohellohellohello"string ( "hello" repeated 10 times).

x3 = input ("Please enter an arithmetic operation (addition,subtraction,multiplication or division): ") if x3 != "addition" and "division" and "multiplication" and "subtraction": #if the input for the ...