Division is arithmetic that distributes a quantity into equal parts or determines how many equal groups fit within it. For example, 12 ÷ 3 can mean splitting 12 into 3 equal shares, giving 4 in each, or making groups of 3, giving 4 groups. Division is the inverse of multiplication, though dividing by zero is undefined.
In cyber security, division is not a specific attack technique, but it is useful in calculations that support secure systems. Engineers may use it to estimate data rates, divide workloads among servers, or calculate storage and resource requirements. In a slide rule, aligned logarithmic scales provide approximate division results. Whether using an analog tool or software, checking units and whether an answer is plausible can help catch calculation errors that might affect system configuration or capacity planning.