How to use the @ethersproject/bignumber.FixedNumber function in @ethersproject/bignumber

"use strict";
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    result["default"] = mod;
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
var contracts_1 = require("@ethersproject/contracts");
exports.Contract = contracts_1.Contract;
exports.ContractFactory = contracts_1.ContractFactory;
var bignumber_1 = require("@ethersproject/bignumber");
exports.BigNumber = bignumber_1.BigNumber;
exports.FixedNumber = bignumber_1.FixedNumber;
var abstract_signer_1 = require("@ethersproject/abstract-signer");
exports.Signer = abstract_signer_1.Signer;
exports.VoidSigner = abstract_signer_1.VoidSigner;
var wallet_1 = require("@ethersproject/wallet");
exports.Wallet = wallet_1.Wallet;
var constants = __importStar(require("@ethersproject/constants"));
exports.constants = constants;
var providers = __importStar(require("@ethersproject/providers"));
exports.providers = providers;
var providers_1 = require("@ethersproject/providers");
exports.getDefaultProvider = providers_1.getDefaultProvider;
var wordlists_1 = require("@ethersproject/wordlists");
exports.Wordlist = wordlists_1.Wordlist;
exports.wordlists = wordlists_1.wordlists;
var utils = __importStar(require("./utils"));
exports.utils = utils;