# Make 100€ out of 1€

With the following trick you can turn 1€ into 100€: \begin{align} 1 \, € &= 2 \, € \cdot 0.5 \, € \\ &= 200 \, \text{ct} \cdot 50 \, \text{ct} \\ &= 10 \, 000 \, \text{ct} = 100 \, € \end{align}

Where did I cheat in this calculation?

• you can use the same trick to turn 100E into 1E – JonMark Perry Nov 4 '17 at 16:54
• @JonMarkPerry Oh, now I know why my money always vanishes so quickly :-S – A. P. Nov 4 '17 at 16:55
• That’s a nice trick which I’ve never encountered before. I wonder if there are any economic formulae in which the square of money unit is a thing. – Laska Nov 4 '17 at 22:15