“When they had done this,
So many fish
That their nets
καὶ τοῦτο ποιήσαντες συνέκλεισαν πλῆθος ἰχθύων πολύ· διερήσσετο δὲ τὰ δίκτυα αὐτῶν.
This is similar to John, chapter 21:6, where the nets were filled to capacity. Luke said that when they did what Jesus had told them to do (καὶ τοῦτο ποιήσαντες), they caught so many fish (συνέκλεισαν πλῆθος ἰχθύων πολύ) that their nets were beginning to break (διερήσσετο δὲ τὰ δίκτυα αὐτῶν). The moral was to do what Jesus said. Then all will be well for you in abundance.