Mathematical calculator for verification of the rule of divisibility (the numbers 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 16, 17, 19, 23 and 49), in integer numbers. Available in three languages (English, Spanish and Portuguese), with friendly interface and easy to use. Performs detailed calculations.

Structure has to perform several calculations simultaneously, and for converting the results into files .Html (HyperText Markup Language) or .rtf (Rich Text Format), both common in various text editors, such as Word.

It has its own file system (.c2m_div), or allowing file transfer examples, between people.

Ideal for study and memorization of the subject (Rule of divisibility), as well as for preparation and correction of exercises or examples.