Why not ?

static int numberOfChocolates(int money, int price, int bonus) {
    int chocolades = money / price;
    MainAndRest accumulated = accumulate(chocolades, bonus);
    if (accumulated.rest >= bonus) {
        MainAndRest accumulatedRests = accumulate(accumulated.rest, bonus);
        int result = chocolades + accumulated.main + accumulatedRests.main;
        return result;
    } else {
        int result = chocolades + accumulated.main;
        return result;
    }
}

static class MainAndRest {

    int main;
    int rest;

    public MainAndRest(int main, int rest) {
        this.main = main;
        this.rest = rest;
    }

}

static MainAndRest accumulate(int subMoney, int bonus) {
    int main = subMoney / bonus;
    int rest = subMoney % bonus;
    if ((main + rest) < bonus) {
        return new MainAndRest(main, rest);
    } else {
        MainAndRest sub = accumulate(main, bonus);
        return new MainAndRest(main + sub.main, rest + sub.rest);
    }
}