The ‘Multiply’ component can be found in the list of ‘Arithmetic’ components.

We need to add the ‘Multiply’ component and a ‘Numeric constant’ to use as the multiplier.

Rename the ‘Multiply’ component as “Carbon Storage (kg/m^2)” and the ‘Numeric constant’ to “From AGB to Carbon Storage” and enter the value 0.47.

Connect the merged AGB dataset and the numeric constant to the ‘Multiply’ component A and B nodes.

Now we repeat the operation to convert to tons of carbon per hectare as shown.

The previews indicate that each step is working properly.