Jquery - Multiply 3 input fields and auto populate the 4th input

Jquery - Multiply 3 input fields and auto populate the 4th input

I've got 3 input fields:
<input type="text" name="height" /> * <input type="text" name="width" />
*<input type="text" name="length" />
and the total:
= <input type="text" name="total" />
how to do with jquery that will auto populate the total field?
Thanks!