The expression follows the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

First, we handle the multiplication:
\[
20 \times 3 = 60
\]

Then, add 3 to the result:
\[
3 + 60 = 63
\]

So, the final result is **63**.

Would you like a detailed explanation of the order of operations?

Here are some related questions:
1. What is the result of \( 5 + 15 \times 2 \)?
2. How would you evaluate \( 10 + 3 \times 6 \)?
3. Can you solve \( 4 + 8 \times 5 - 7 \)?
4. What is the difference between evaluating \( 3 + 20 \times 3 \) and \( (3 + 20) \times 3 \)?
5. How do parentheses affect the result in mathematical expressions?

**Tip:** Always follow the order of operations to avoid calculation mistakes.

Learn how to solve the arithmetic expression 3 + 20 * 3 by following the order of operations (PEMDAS). This problem demonstrates how multiplication takes precedence over addition, leading to a final result of 63. Suitable for students in Grades 4-6.

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