• Multiply the 6 and 4 to get 24.
• Since 24 is greater than 9, you'll have to carry the 2.

Step #2:

• Multiply the 4 and 4 to get 16.
• And, add the carried 2 to get 18.
• 18 is greater than 9, but there are no more digits to carry over, so just write the 1 down in front.

Step #3:

• Multiply the 6 and 3 to get 18.
• Since 18 is greater than 9, you'll have to carry the 1.

Step #4:

• Multiply the 4 and 3 to get 12.
• And, add the carried 1 to get 13.
• 13 is greater than 9, but there are no more digits to carry over, so just write the 1 down in front.