[Vuejs]-How to validate numbers in vuetify rules

The numbers you accept the factor of 111.

let num = 111;

if (num < 1000) {
  if (Number.isInteger(num / 111)) {
    console.log(true);
  } else {
    console.log(false)
  }
} else {
  // create the validation rules for the numbers that bigger than 999
}