Learn in the textbookThe Five Basic Functions of a Computer
DefinitionArithmetic/logic (演算) is the function that performs calculations such as addition and comparisons of size on data.
ExplanationComputation is carried out by the arithmetic logic unit inside the CPU, which together with the control unit makes up the CPU (processor). It includes arithmetic operations, which calculate with numbers, and logical operations, which combine true/false values with AND, OR and similar operators.
AnalogyThink of a clerk who quickly and accurately finishes whatever sums are handed over. What to calculate always comes from someone else.
Memory hookThe kanji 演 means "to perform", as on a stage: picture an actor who goes on only after receiving the script, which here is the instruction.