How to use the custom calculator.
1. Click the operation you wish to perform. For instance calculate BMI.
2. Populate the required input fields. In this case weight and height.
3. Click on the calculate button below. Note, outputs appear only after the button has being clicked.
4. To perform another operation such as temperature conversion, clear all the cells first to get rid of previous labels and controls from the previous operations. Proceed with the new operation as shown from step one again.