I attached a file here. And so here is my explanation
So here's the way that my country teach kids how to divide numbers
4024 | 68
If you can see, 40 cannot divide for 68, so we could take 402
Take 40 to compare with 6, we could have 6 as our quotient. But unfortunately, 6*68 = 408, so we'll take 5 instead.
5*68 will equal 304, 402 - 340 = 62
Takes 4 down with 62 so we got 624. Do the same process as above. Hope it helps.