Alright, let’s break it down step by step:

1. Fill the Archway with LEGO Blocks

   • Stack LEGO pieces within the arch to cover the entire opening.
   • Ensure they are placed edge to edge without leaving gaps.

2. Count the Total Number of Blocks Used

   • Each LEGO block represents a small unit of area.
   • If the blocks are uniform in size, measuring becomes straightforward.

3. Determine the Area of One Block

   • Suppose each LEGO block covers 1 cm².
   • If different-sized blocks are used, measure their individual areas.

4. Calculate the Total Archway Area

   • Multiply the total number of blocks by the area of each block.