```js const {MD5} = require('crypto-js') // 4297f44b13955235245b2497399d7a93 const encryptedString = MD5('123123').toString(); // 487f7b22f68312d2c1bbc93b1aea445b const encryptedNumber = MD5(123123).toString(); ``` Why using 123123 is wrong? Thx