Step #1: - Multiply the 4 and 5 to get 20.
- Since 20 is greater than 9, you'll have to carry the 2.
Step #2:
- Multiply the 2 and 5 to get 10.
- And, add the carried 2 to get 12.
- 12 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 4 and 3 to get 12.
- Since 12 is greater than 9, you'll have to carry the 1.
Step #4:
- Multiply the 2 and 3 to get 6.
- And, add the carried 1 to get 7.
All done! Just add the blue numbers together to get your answer:840
and that's your answer!