That's what happens in e.g. the Maker stablecoin project. Decimal fixed point to give sub-wei precision when prorating per-second compounding fees. Other than t

That's what happens in e.g. the Maker stablecoin project. Decimal fixed point to give sub-wei precision when prorating per-second compounding fees. Other than the normal simple arithmetic operations, we use "exponentiation by squaring" to take a decimal fixed point raised to an integer power.