No, you do not.
Example:
6 x 7 = 42
Six is one digit and seven is larger, and it ends up double digits.
3
17 \
A five digit number with 9 is 99999. A number which is 1000 times larger (not 1000 times as large) is 99999000.
Multiply the three-digit number by the one's digit, or last digit, of the two-digit number. That is your first part. Now multiply by the second-to-last digit, or ten's digit, and multiply the result by 10. That is your second part. Add the two parts and that is your answer.
There are two answers to this question; When you multiply 1738 by 4 you get 6952 When you multiply 1963 by 4 you get 7852
0
7
81 is.
You multiply the one digit number on the bottom to every number on the top starting at the right and so on with every other number on the bottom.
Here are two examples
The largest single digit prime number is 7.
6 is the only single digit perfect number.