Local Wisdom of Mathematics in Building Calculations Ponorogo Traditional House

Abstract.This article aims to reveal the logical relationship between the folklore of the Ponorogo
community in the tradition of building a house with a mathematical calculation pattern. It is
important to know how people overcome the problems of living wisely through mathematical
calculations. Therefore, this research focuses on how the integration of local wisdom in the foklor
for mathematical calculations in determining good days (dragon days) according to the beliefs
of the Ponorogo community. This research uses descriptive method by describing the pattern of
mathematical calculation in the tradition of building a house so that it can be known about natural
phenomena or human engineering