In a recent year, 44% of all college students were enrolled part-time. If 8.3 million college students were enrolled part time that year, what was the total number of college students?
Round your answer to the nearest million

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years