var CowClicker = React.createClass({
  getInitialState: function() {
    return {
      clicks: 10,
      val:1                   // this has been added by me
    };
  },

  onCowClick: function(evt) {
    this.setState({
      clicks: this.state.clicks + 1,
      val: this.state.val * this.state.clicks,  // code part in question
      }
    });
  },

  render: function() {
    return (
      <div>
        <div>Clicks: {this.state.clicks}</div>
        <div>Val: {this.state.val}</div>
        <img
          src="http://s3.bypaulshen.com/buildwithreact/cow.png"
          onClick={this.onCowClick}
          className="cow"
        />
        <p>Click the cow</p>
      </div>
    );
  }
});

ReactDOM.render(
  <CowClicker />,
  document.getElementById('container')
);

onCowClick: function(evt) {
    this.setState({
      clicks: this.state.clicks + 1,
      alert(this.state.val),
      if(this.state.val > 1000000){
        val: 1,
      }else{
        val: this.state.val * this.state.clicks,
      }
    });
  },