operation = io.read()
a = io.read("*n")
b = io.read("*n")
if(operation=="add")
then
    print(a,"+",b,"=",a+b)
elseif(operation=="subtract")
then
    print(a,"-",b,"=",a-b)
elseif(operation=="multiply")
then
    print(a,"X",b,"=",a*b)
elseif(operation=="division")
then
    print(a,"/",b,"=",a/b)
end