OrionReed

// 3D Dom viewer, copy-paste this into your console to visualise the DOM as a stack of solid blocks.
// You can also minify and save it as a bookmarklet (https://www.freecodecamp.org/news/what-are-bookmarklets/)
(() => {
  const SHOW_SIDES = false; // color sides of DOM nodes?
  const COLOR_SURFACE = true; // color tops of DOM nodes?
  const COLOR_RANDOM = false; // randomise color?
  const COLOR_HUE = 190; // hue in HSL (https://hslpicker.com)
  const MAX_ROTATION = 180; // set to 360 to rotate all the way round
  const THICKNESS = 20; // thickness of layers
  const DISTANCE = 10000; // ¯\\_(ツ)_/¯

zablotski

$('td:contains("2.0")').parent().remove(); //usunięcie wpisów z oceną 2
var sum=0; //suma ECTS 
var mulSum=0; // suma ECTS * ocena 
$('td[title="ocena"]').each(function(){
    mulSum += parseFloat($(this).text()) * parseFloat($(this).next().next().text());
    sum += parseFloat($(this).next().next().text());
    console.log(parseFloat($(this).text()), parseFloat($(this).next().next().text()));
    
});
console.log(mulSum, sum, mulSum/sum);