Write the numbers one above the other, aligned by place value
Multiply the bottom number’s ones digit by each digit of the top number from right to left
Write the ones digit of each product and carry the tens digit
Multiply the bottom number’s tens digit by each digit of the top number from right to left
Shift this second row one place to the left
Multiply the bottom number’s hundreds digit by each digit of the top number from right to left
Shift this third row two places to the left
Add all the partial products
Check the final sum for the answer