Answer: 1,728.
Step-by-step explanation: The First thing you should do is highlight key details. In this problem, You must multiply 12 by 144. Let's break it down. first multiply 12 by 100. To do this, simply add two zeros to the twelve. Now you have 1200. Next, multiply 12 by 4, you should get 48. The last thing to do is multiply 12 by 40. Now you might be thinking, my goodness! How?! It's simple. Multiply 12 by 4, and add a zero. All you have to do now is add 1200+480+48. In total, you should come up with 1,728.
