I don't know, you cut the big metal plate, and the rest of the materials can't be put together to prevent knots.

If you can't

It should be 22 because of the size of 18 decimeter? 30 decimetres and 24 decimetres? Rectangular metal plate with 36 large plates, cut into pieces 15 and 13, and then spend 13 large plates. The remaining two dimensions are 18 decimeter? Which two rectangular metal plates are 30 decimeters? Can be cut into large plates, so the last two plates should be 14 plates.

Size, where is the remaining 36 decimeters? A rectangular metal plate of 50 decimeters, just cut a plate casually.

Make full use of 22 circuit boards