1 inch equals10cm, so 2 1 inch equals 21× 310cm = 70cm.

Inches are municipal units of length, which are unique to China. 10 inch equals 1 foot, 1 inch is about 3.33 cm, and 1 meter equals 30 inches. Cun (pinyin: cùn) is a first-class Chinese character (commonly used word) in the General Specification for Chinese. Its structure, stroke shape, stroke order and strokes were adjusted many times during the official revision. This word first appeared in the Warring States script.

A centimeter is a unit of length measurement, equal to one hundredth of a meter. Inch is a unit of length. Ten equals one inch and ten equals one foot. The international system of units chooses seven independent quantities as basic quantities. The first is length. Its basic unit name is meter, the symbol is m, and centimeter is not an international unit.

Inch usage scenario

1, clothing size: China traditional clothing, often in inches as the unit of measurement. For example, the sizes of some traditional clothes and shoes in China are expressed in inches. This way is more intuitive than the European and American size standards, and it is more in line with the Asian body characteristics.

2. Furniture size: In some traditional furniture, inch is also used as the unit of size. Such as the size of some wooden furniture, screens, etc. Usually expressed in inches. This way is more in line with the traditional culture of China and more intuitive.

3. Craft products: In some traditional craft products, inch is also used as the unit of size. For example, the size of some ceramics and jade articles is often expressed in inches. This way is more in line with the traditional culture of China.