Is it easy to cast a net and make three holes?

It's not good to cast a net and make three holes.

1, weaving three nets means occupying three meshes, leaving one empty means tying a pendant and then making a mesh, then tying a pendant, and so on.

2. For example, in the last lap, the net is cast, the mesh number is 560, the mesh is 5cm, and the pendant is 7cm. If you make three holes, you need to use the 140 pendant. Namely: 560÷4= 140 pendant.