what I want to do may be simple but what I don't understand is, When I click on any of the buttons, I push the new number. but what I want is, I want every data pushed to be initialized.

<div>
    output : {{hello}},
    <button @click="addItem(5)"></button>
    <button @click="addItem(65)"></button>
</div>
<script>
export default {
  data() {
    return {
      hello: [1, 9, 15, 7, 9]
    }
  },
  methods: {
    addItem(newnumber) {
      this.hello.push(newnumber)
    }
  }
}
</script>