下面 JavaSript 代码的输出结果是__?

const add = () => {
    const cache = {};

    return num => {
        if (num in cache) {
            return `From cache! ${cache[num]}`;
        } else {
            const result = num + 10;
            cache[num] = result;

            return `Calculated! ${result}`;
        }
    };
};

const addFunction = add();

console.log(addFunction(10));
console.log(addFunction(10));
console.log(addFunction(5 * 2));