A calculator watch is a special type of watch that not only tells you what time it is but also helps you do math problems like addition, subtraction, multiplication, and division.
Imagine you have a watch on your wrist that has tiny buttons and a small screen. When you press the buttons, numbers and symbols appear on the screen. These numbers and symbols stand for math problems like 5+3 or 12x8 or 20/5.
You can use the watch to solve math problems without needing a piece of paper or a real calculator. All you have to do is press the numbers and symbols on the tiny buttons and the watch will show you the answer on the screen.
The calculator watch is very useful for anyone who needs to do math on the go, like students or anyone who works with numbers. It's like having a mini-computer on your wrist!