Why is RSA not decrypted?

Question

JavaScript

I'm trying to figure out encryption. Everything seems to work, but only if you do not convert the numbers to ASCII, but as soon as the number is greater than 9, I get the wrong result.

const p = 3, q = 11; // simple numbers
const n = p * q; // simple numbers summ
const e = Math.floor(Math.random() * EilerFunc(p, q) + 1); // public key
const d = Math.round(EilerFunc(p, q) / e);
const message = "3125";

function EilerFunc(p, q) {
  return ((p - 1) * (q - 1));
}

function makeASCII(str) {
  return str.split('').map(char => char.charCodeAt()).join(' ');
}

function encrypt(str) {
  return str.split(' ').map(char => Math.floor(Math.pow(parseInt(char), e) % n)).join(' ');
}

function decrypt(str) {
  return str.split(' ').map(char => {
    let asciiSymbol = (Math.pow(parseInt(char), d) % n);
    
    return parseInt(String.fromCharCode(asciiSymbol));
  }).join(' ');
}


const asciiMessage = makeASCII(message);
const protected = encrypt(asciiMessage);
const decoded = decrypt(protected);

write("message:", message);
write("asciiMessage:", asciiMessage);
write("encrypt:", protected);
write("decrypt:", decoded);

function write() {
  document.querySelector('.content').innerHTML += [...arguments].join(' ') + '</br>';
}