Write an calculator function in Python.

It accepts $3$ parameters: integer operand $1,$ integer operand $2$ and a word which can be "plus", "minus", "multiply" and "divide"

Apply "plus", "minus", "multiply", and "divide" to operand $1$ with operand $2,$ depends on the word.

Please note that $0$ can NOT be a divider, please check it when you process "divide".

Print the result.

Call the function to test it$.$