Hey,
It is possible to achieve, using wix-data, with code more or less like this:
import wixData from 'wix-data';
$w("#mySubmitButton").onClick(function() {
wixData.query('myCollectionName').find().then(results => {
const record = results.items[0]; // Take the first record
record.myNumericField += Number($w('#myNumericInput').value);
wixData.save('myCollectionName', record);
});
});
Good Luck,
Itai