Gas gauge calibration unit

The spread sheet lets you enter formulas. If you place an = in a box, you can start a formula. Then you can click on another cell, then operation * , then another cell. The cell with = is then the other two cells multiplied. In the formulas, A3 is column A, row 3. The $ locks the position, this is needed when formulas are copied by dragging, and the formula needs to reference a cell.