The image shows a handwritten note with several lines of text written in Vietnamese. The note appears to be a mathematical calculation or problem-solving exercise. Here is a detailed description:

1. **Top Line**: The first line reads "7/3 days 16000" followed by "2/5 days 17000".
2. **Middle Lines**: There are two columns of calculations:
   - The first column has three equations:
     - \( 1 + 4 = 5 \)
     - \( 3 + 1 = 4 \)
     - \( 2 \times 2 = 4 \)
   - The second column has two equations:
     - \( 2 \times 2 = 4 \)
     - \( 2 \times 2 = 4 \)

3. **Bottom Line**: The last line contains a single equation:
   - \( 2 \times 2 = 4 \)

The note seems