I have 99999999999 dollars

That's a significant amount of money! With 99999999999 dollars, you would be considered one of the wealthiest individuals in the world. You could fulfill all your financial needs, invest in various ventures, support charitable causes, travel the world, and live a life of luxury and comfort. It's important to remember to manage and utilize such a significant sum responsibly and ethically.

I buy a house for 100000000 dollars how much do I have left

Niceeee :)

If you spend 100,000,000 dollars to buy a house, you would have 99,999,999,999 - 100,000,000 = 99,899,999,999 dollars left.

After purchasing a house for 100,000,000 dollars, you would have 99,899,999,999 dollars left.

Then I donate 555555555 dollars to charity's around the country

If you donate 555,555,555 dollars to various charities around the country, you would have 99,899,999,999 - 555,555,555 = 99,344,444,444 dollars left.

Then I buy 20000 acres at 2000000000 dollars

If you spend 2,000,000,000 dollars to buy 20,000 acres of land, you would have 99,344,444,444 - 2,000,000,000 = 97,344,444,444 dollars left.

Then I build .many house and businesses there all costing 55555555555