Convert from shaku to inch [international, U.S.]

Unit Definition (shaku)
The shaku is a Japanese word meaning "measure" or "scale", also used for several traditional units in Japan: [1] As a unit of distance, the shaku is the Japanese foot, equal to about 30.30 centimeters or 11.93 inches; [2] As a unit of area, the shaku equals 330.6 square centimeters (51.24 square inches); [3] As a unit of volume, the shaku equals about 18.04 milliliters (0.61 U.S. fluid ounce).

Unit Definition (inch [international, U.S.])
The inch is a traditional measurement of distance equal to 1/12 of a foot, or exactly 2.54 centimeters. The Old English word "ynce" is derived from the Latin uncia, meaning a 1/12 part. It follows that "inch" and "ounce" actually have the same origin. The inch was originally defined in England in two ways: as the length of three barleycorns laid end to end, or as the width of a man's thumb at the base of the nail. The barleycorn definition is peculiarly English, but the thumb-width definition is generic. In many european languages the word for inch actually also means thumb: examples include the Dutch duim, Swedish tum, French pouce, and Spanish pulgada. In the history of English units the inch seems to come before the foot, as after the Norman conquest of 1066, the foot was defined as 12 inches, rather than the inch being defined as 1/12 foot.