SOURCE

var app = new Vue({
  el: '#app',
  data() {
    return {
      form: {
          value: 0,
      }
    }
  }, 
  computed: {
      value: {
          get: vm => vm.form.value / 100,
          set(value) {
              this.form.value = value * 100
          }
      }
  },

  watch: {
      'form.value'(val) {
          console.log(val)
      }
  },
  methods: {
    onSubmit() {
        let form = this.form.$readView()
        console.log(JSON.stringify(form, null, 2))
    },
  },
});

<div id="app">
    <input type="text" v-model="value" type="number">
    <button @click="onSubmit">test</button>
</div>