Pass fetch api results to function and use the processed data from the function

I am fetching numbers from this api

let fetchRes = fetch("https://api.lunarcrush.com/v2?data=assets&key=n8dyddsipg5611qg6bst9&symbol=AVAX")
  .then((res) => res.json())
  .then((result) => {
    console.log(result);
    document.getElementById('result').innerHTML = result.data[0].market_cap;
  })
  .catch(error => {
    console.log(error);
  })

I want the numbers fetched (example- 7692083188) to be displayed in like 7.69B. I know this code for converting but how do I connect both codes to acheive my data displayed as 7.69B?

function convertToInternationalCurrencySystem (labelValue) {

    // Nine Zeroes for Billions
    return Math.abs(Number(labelValue)) >= 1.0e+9

    ? (Math.abs(Number(labelValue)) / 1.0e+9).toFixed(2) + "B"
    // Six Zeroes for Millions 
    : Math.abs(Number(labelValue)) >= 1.0e+6

    ? (Math.abs(Number(labelValue)) / 1.0e+6).toFixed(2) + "M"
    // Three Zeroes for Thousands
    : Math.abs(Number(labelValue)) >= 1.0e+3

    ? (Math.abs(Number(labelValue)) / 1.0e+3).toFixed(2) + "K"

    : Math.abs(Number(labelValue));

}

( convertToInternationalCurrencySystem (7692083188) );
   

Answer

You just need to set your #result innerHTML to convertToInternationalCurrencySystem(result.data[0].market_cap) by changing this line:

document.getElementById('result').innerHTML = result.data[0].market_cap;

To this:

document.getElementById('result').innerHTML = convertToInternationalCurrencySystem(result.data[0].market_cap);

Check and run the following Code Snippet for a practical example of the above:

function convertToInternationalCurrencySystem(labelValue) {

    // Nine Zeroes for Billions
    return Math.abs(Number(labelValue)) >= 1.0e+9

    ? (Math.abs(Number(labelValue)) / 1.0e+9).toFixed(2) + "B"
    // Six Zeroes for Millions 
    : Math.abs(Number(labelValue)) >= 1.0e+6

    ? (Math.abs(Number(labelValue)) / 1.0e+6).toFixed(2) + "M"
    // Three Zeroes for Thousands
    : Math.abs(Number(labelValue)) >= 1.0e+3

    ? (Math.abs(Number(labelValue)) / 1.0e+3).toFixed(2) + "K"

    : Math.abs(Number(labelValue));

}

let fetchRes = fetch("https://api.lunarcrush.com/v2?data=assets&key=n8dyddsipg5611qg6bst9&symbol=AVAX")
  .then((res) => res.json())
  .then((result) => {
    document.getElementById('result').innerHTML = convertToInternationalCurrencySystem(result.data[0].market_cap);
  })
  .catch(error => {
    console.log(error);
  })
<h1 id="result"></h1>