Yandex map Api how to get coordinates from an address and extract them from an object?

Question

JavaScript

There is a working code:

var myGeocoder = ymaps.geocode("Петрозаводск");
res = myGeocoder.then(
function (result) {
    var coordinates = result.geoObjects.get(0).geometry.getCoordinates();
    console.log(coordinates);
},
function (err) {
    alert('Ошибка');
}
);

I watch the result of console.log(coordinates);

How can I extract the latitude and longitude from this object separately?