One of historically retained and fancy methods of multiplication often called the Russian peasant algorithm. You don’t need multiplication facts to use the Russian peasant algorithm; you only need to double numbers, cut them in half, and add them up. Here are the rules:

1. Write each number at the head of a column.
2. Halve the number in the first column, and double the number in the second column.
3. If the number in the first column is odd, divide it by two and drop the remainder
4. If the number in the first column is even, cross out that entire row
5. Keep doubling, halving, and crossing out until the number in the first column is 1
6. Add up the remaining numbers in the second column. The total is the product of your original numbers