A long hundred, also known as a long hundredweight, is a unit of weight that is equal to 112 pounds in the US customary system. To convert a piece to a long hundred, you need to know that a piece is equal to 8 pounds. The conversion from piece to long hundred can be calculated by dividing the given weight in pieces by 14, as 112 pounds divided by 8 pounds per piece equals 14 pieces per long hundred. This conversion is essential in various industries, including construction, where materials like lumber and drywall are often sold by the long hundred. It is also used in scientific applications, such as calculating the weight of large quantities of materials in physics and engineering.