Nested method, calculation attribute is not applicable, use methods

<template>
<div>
    
<ul v-for="numbers in sets" :key="numbers.id">
  <li v-for="n in even(numbers)" :key="n">{
    {
     n }}</li>
</ul>

</div>
</template>

<script>
export default {
    
    name: 'item',
    data() {
    
  return {
    
    sets: [[ 1, 2, 3, 4, 5 ], [6, 7, 8, 9, 10]]
  }
},
methods: {
    
  even(numbers) {
    
    return numbers.filter(number => number % 2 === 0)
  }
}
}
</script>

even() even numbers