Khan University- complex Multiplication

I was sitting at the computer today and I was doing problems like 4329 times 52 or 1198 * 215 and Megan wanted to do them when she say me do this. I said Megan, you are not here  yet.  Mommy is just exercising her brain.  Anyway, she wanted to do it. She cried. I taught her how and when it came to big multiplications like 8 times 4, or 9 times 4, and how to carry up the ten's places to the next numbers we have to multiply and then multiply those numbers and then add the carried numbers.  she did pretty well.