James invested $$1000$ in Facebook's stock a year ago. Today, he found out that the value of the Facebook stock has gone down $40\%$ since the day he purchased it$.$

How much money is left in James' Facebook stock investment?

Use a math expression to determine the amount left in James' investment account.

Assign the amount of money left to the variable net$\_$worth

Print the value stored in net$\_$worth.