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    JavaScript

    function repeatedString(s, n) {
        // Write your code here
        let count = 0;
        let remCount = 0;
        for(let i = 0; i < s.length; i++) {
            if(s.charAt(i) === 'a') count++;
            if(i < n % s.length && s.charAt(i) === 'a') remCount++;
        }
        let totalCount = parseInt(n / s.length) * count + remCount;
        return totalCount;
    }