Query on interest rates and returns

There are interest calculators out there from banks and the US government.

But when I put in some numbers, for example, I start with $100 at a rate of 5% calculated daily paid monthly, it could take over 20 years to double that investment.

But when I manually on the calculator, put in 100× 105% 15 times in a row, I get $207.89. Five. Take away the initial $100, then divide the remainder by five, I have 21 point57 times that five dollars has accumulated.

Albert Einstein called compound interest the eighth wonder of the world, however, if you take $100 at 5% /365, gives $0.013 a day no way matches that return.

I hope Debut is able to give us returns that Einstein predicted over 100 years ago.