3. Solve the puzzle. Notice that the 4 symbols make the following math arithmetic symbols: Multiplication, Addition, Division, and Subtraction.
Using the two shapes inside and the number of sides they have, do the math. 
4. Circle (0) times Square (4) = 0
Triangle (3) plus Pentagon (5) = 8 Triangle (3) divided by Triangle (3) = 1 Pentagon (5) minus Triangle (3) = 2 So change the numbers to 0812. Pick up the key where the glowing light is and open the door with it. 
5. Proceed to the next level!
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