a plurality of calculator groups constituting a systolic array composed of a plurality of rows and a plurality of columns,

wherein calculator groups included in each row of the plurality of rows propagate a data value set in a data propagation direction,

wherein each calculator group of the calculator groups included in the each row receives the data value set through a single input data path, and comprises a plurality of MAC (Multiplier-Accumulator) circuits and a drain path selection circuit,

wherein the plurality of MAC circuits receive a data value included in the data value set, respectively, and generate drain values, respectively, each of the drain values being included in a corresponding drain value set among a plurality of drain value sets, and

wherein the drain path selection circuit selects at least one output drain path among a plurality of output drain paths and outputs the drain values only to the selected at least one output drain path.