VS-code prettier extension removing perentheses

Question

hello guys i need help with my code when i add perentheses prettier keeps on removing them, i did a little research and added .prettierrc in my root directory with the folloing:

 {
    "bracketSpacing": true,
    "jsxBracketSameLine": false,
    "singleQuote": true,
    "trailingComma": "all",
    "arrowParens": "always",
    "removeParens": false
     }

i am trying to add perentheses around my operation but it is not letting me

const modulo = (a, b) => {
  return ((a * 10) % (b * 10)) / 10;
};
const divide = (a, b) => {
  return (a * 10) / (b * 10) / 10;
};
const multiply = (a, b) => {
  return (a * 10 * (b * 10)) / 100;
};
const subtraction = (a, b) => {
  return (a * 10 - b * 10) / 10;
};
const addition = (a, b) => {
  return (a * 10 + b * 10) / 10;
};

any help??? i tried to add perentheses around my functions but prettier isnt allowing me, for some reason it is allowing my first function to work but not other function