how to increase value in Realtime Database

Question

 const dataFromDbUser = admin.database().ref('Base/' + 'users/'+ userId);

 dataFromDbUser.on('value',(item)=>{
 item.val().money //10
 })

how can i increase the value of money? Thank you

using node.js

this is what the base looks like

Base:{
   users:{
      22333443:{
         money:10
      }
   }
}