Resize video

I have an original video that is 486x356 and frame size is seen with squares and I want to resize to 1920 × 1080 (HD) How I can do this in kdenlive? Thank you.

Create a 1920x1080 project, add the clips to the project (ignore the message about wrong format). Add the clips to the timeline. If the clips are distorted, add an effect for correction. Render.