Mark & Cut First Cushion Piece

What happens here

The person begins by marking a straight line on a large, rectangular foam block, likely to the measured length for one side of the L-shaped bench. They then use an electric carving knife to carefully cut along this marked line, separating the first custom-sized foam piece from the larger block. This initial cut creates the longer segment of the L-shaped cushion.

Goal: Cut the main, longer section of the L-shaped foam cushion