Convert from t'sun to feet [Rome]

Unit Definition (t'sun)
The t'sun is a Chinese unit of distance equal to 0.1 ch'ih or about 1.41 inches (3.58 centimeters).

Unit Definition (feet [Rome])
A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. There are twelve inches in one foot and three feet in one yard.