You would need to get the values of the ACF fields and set those values in the script. Here is a simple example using part of the snippet from the link you provided
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Task', '<?php the_field('hours_per_day); ?>'],
['Work', <?php the_field('work')],
// etc....
]);
var options = {
title: '<?php the_field('title'); ?>'
};
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
chart.draw(data, options);
}