How to multiply two number which are in a link list in C++?

Question

I mean multiply two numbers which every  digits are in every node of the link list finally put the digits of the result in every node of link list like I explained before.
For example: 
Note: suppose the list below is link list and the digits in them are the data of node in link list.

first Number:

1

2

0

  second Number:

1

0

0

0

 
 the result of multiply:

1

2

0

0

0

0