Convert from stang to tsubo

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.

Unit Definition (tsubo)
The tsudo is an informal unit of area used in Japan to measure area inside buildings. One tsubo is an area of about 3.3 square meters (3.95 square yards), an area that can be covered neatly by two traditional tatami mats.