题解 | 单组_保留小数位数

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    while(line = await readline()){
        let tokens = line.split(' ');
        let a = parseFloat(tokens[0]);
        console.log(a.toFixed(3))
    }
}()