You could increase the annual salary of every North Korean living in Pyongyang by 50% if you took Buffett's donation to the Bill and Melinda Gates Foundation and distributed it evenly to them.

North Korea's capital Pyongyang has a population of 2.843 million. And the average North Korean makes an estimated $1000-2000 per year (so we used the number $1500).

Buffett donated $2.1 billion to the Bill and Melinda Gates Foundation. That means that every person in Pyongyang would hypothetically get $738.65 — an amount that is 49.2% of the annual per capita earnings in North Korea.

Keep in mind, however, that Buffett's donation is in class B shares.

Source: CNBC