Convert from pyong to stang

Unit Definition (pyong)
The pyong is a traditional Korean unit of area equal to about 3.306 square meters or 3.954 square yards. The pyong is widely used in Korea to measure areas both inside and outside buildings. The Taiwanese ping corresponds closely to the pyong.

Unit Definition (stang)
The stang is a traditional Welsh unit of land area generally equal to 3240 square yards, 0.6694 acre, or 0.2709 hectare.