IF this is a math question, the other answers covered it.
IF this were a macroeconomics question, there's something called the "money multiplier." For Keynesians this is the aggregate effect of an increase in spending, which is some multiple of that spending. This is the basis for economic policies calling for "spending our way out of the recession."
For monetarists, The "Chicago School of Economics' or Nobel Laureate Milton Friedman's theories, there is a money multiplier in the financial sector due to fractional reserve banking. Obama early in his presidency defending policies helping banks by saying each dollar injected into the banking system would have a multiplier effect on the economy. He may have used 10 times as the multiplier.
Or there's the accounting identity MV=PQ where M is the money supply V is the velocity of money, P is the price level and Q is the quantity of products. Increase M and its effect is multiplied by V on its effect in the real sector. Initially it may directly affect Q, but eventually it causes the price level to rise, with less real effect on output
All these multipliers tend to result from fiat money, a money that is not convertible into gold or any real product. Fiat money is money because the government makes it legal tender. Otherwise it would have no value. Well, that used to be the theory. Now with bitcoin and cryptocurrencies, the private sector has mimicked the government in creating fiat money with no real value, other than people use it to pay debts or as a medium of exchange or store of value.
Or there's the "money grows on trees" theory, where you just keep printing money overtime, and it just multiplies like magic. North Korea counterfeits the US $100 Ben Franklin bill, but Ben Bernanke, Fed Chair said Not to Worry, it's only a few billion of the fakes bills out there. A couple North Korean diplomats got caught passing them at the UN in NYC, but they had diplomatic immunity, so no prosecution, just deportation. Or you can counterfeit your own dollars with a color xerox machine. They look as real as the real. Kids do it, but it costs a $1 to make one, and you'd need to xerox something bigger than a $1 bill to make any money out of it. But they do "multiply" as fast as you feed the xerox machine. Sky's the limit, until you get arrested. Or some people have been known to take a $1 bill, cut the corners off and scotch tape a corner from a $10 bill onto it. Sometimes it does undetected. But store clerks keep holding the bills up to the light, yet they won't notice this "fake" bill, as it's real except for the corners. This way you multiply money, changing a one into a ten, Presto chango, a real magic act.
Compound interest has been called a "miracle" at multiplying money over a long time period. Although it all may be lost due to inflation.