How can I use the data in data as the value of a variable in Vue?

how can I use the data in data as the value of a variable in

Vue?

  data() {
    fetch_data: {ram: 16}
    ...
    select_extra_add_ram: [
      fetch_data.ram * 1, 
      fetch_data.ram * 2, 
      fetch_data.ram * 3
    ],
  }
    

this cannot be used. Excuse me, how can I use the data in data as the basis for other data?

Mar.04,2021

computed find out.

computed: {
  select_extra_add_ram() {
    return [
      this.fetch_data.ram * 1,
      this.fetch_data.ram * 2,
      this.fetch_data.ram * 3
    ]
  }
}
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b40041-2c4cf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b40041-2c4cf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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