how to add units to a number field

there is the following block:

export const RAMBlock: Block = {
  slug: 'ram-block',
  fields: [
    { name: 'type', type: 'text'},
    { name: 'capacity', type: 'number'},

  ],
};

i want to save capacity as number in database, but on the frontend i would expect graphql payload to return a formatted string {capacity: "16MB" }

i have some thoughts of changing the model to something like "capacity__MB" and so on the frontend to split the key but i guess it's not the best way to go.

any suggestions how to do this?