1. A numerically controlled machine to be put into operation by command data stored in a command store, said machine comprising a machine section, reading means for reading said command store to derive command signals representative of said command data, and a numerical control device responsive to said command data for putting said machine section into operation, said numerical control device comprising a microprogrammable computer which comprises: memory means comprising, in turn, first memory means for storing therein said command data, second memory means for storing therein first results of calculation, and third memory means for storing therein a macroprogram composed of a sequence of macroinstructions; a control memory for storing a first microprogram composed of a sequence of first microinstructions and a second microprogram composed of a sequence of a second microinstructions; control means coupled to said reading means, said first through third memory means, and said control memory for storing in response to said command signals said command data in said first memory means, for executing at a first rate said macroinstructions in response to said first microinstructions to successively derive said first results of calculation from the command data stored in said first memory means and to store the successively calculaed first results of calculation in said second memory means, and for executing at a second rate faster than said first rate said second microinstructions to derive second results of calculation from the successively calculated and stored first results of calculation; and operation means responsive to said second results of calculation for putting said machine section into operation.