Describe the bug
The From Base operation fails on fractional inputs due to incorrect mixing of BigNumber objects with native JavaScript arithmetic operators.

src/core/operations/FromBase.mjs, run() method, lines 53-59

for (let i = 0; i < number[1].length; i++) {
    const digit = new BigNumber(number[1][i], radix);
    result += digit.div(Math.pow(radix, i+1));
}

return result;

The code uses += to add a BigNumber to the result and Math.pow() for the divisor. BigNumber objects cannot be combined with native += or Math.pow() — the library provides .plus() and .pow() methods that must be used instead, otherwise the result is corrupted.

To Reproduce
add From Base with radix 2, input 10.1. Expected: 2.5 (1×2 + 0×1 + 1×0.5). Actual: Error: Data is not a valid BigNumber: "2NaN" or similar.

Screenshots

Additional context
Suggested fix:

const radixValue = new BigNumber(radix);
for (let i = 0; i < number[1].length; i++) {
    const digit = new BigNumber(number[1][i], radix);
    result = result.plus(digit.div(radixValue.pow(i + 1)));
}

return result;

This ensures all arithmetic uses BigNumber methods, preserving precision and avoiding type coercion errors.