divide :: biging -> bigint -> number

divide.ts

function divide(a: bigint, b: bigint): number {
    const PRECISION: bigint = 18n;
    const EXP: bigint = 10n**PRECISION;
    if (b === 0n) {
        return 0;
    }
    const integer: bigint = a/b;
    const remainder: bigint = a%b;
    const fractional: bigint = (remainder * EXP) / b;
    const result: bigint = integer * EXP + fractional;
    return Number(result) / Number(EXP);
}