What is being calculated?

Calculation details:

• The image shows a handwritten arithmetic problem.
• The numbers involved appear to be 38 and 13, with a plus sign.
• A horizontal line is drawn below the numbers, indicating a sum or a subtraction result is to be placed there.
• There is also a number '64' visible at the bottom of the image, which might be related to another problem or the solution to this one.

Answer: This appears to be an addition problem: 38 + 13.