A react component that adds 2 numbers from text inputs

import React from 'react';

type Props = {};

type State = {
  a: number,
  b: number
};

export default class App extends React.Component<Props, State> {
  state = {
    a: 0,
    b: 0
  };

  render() {
    return (
      <div>
        <input />
        <input />
        <button>Add</button>
      </div>
    );
  }
}