const citizenship ={
'kg': 1.0,
'oth': 2.20,
};
const select = document.querySelector('select');
const select1 = document.querySelector('#citizenship');
const check = document.querySelector('#check4');
const result = document.querySelector('#result');
const update = () => {
const cType = coefficients[select.value];
const bType = citizenship[select.value];
const cDiag = check.checked ? 0.8 : 1;
const total = 1680 * cType * bType * cDiag;
result.innerText = `Итоговая цена: ${total.toFixed(2)} руб`;
}