#include <bits/stdc++.h>
using namespace std;
using lint     = long long;
const lint inf = 1LL << 60;
lint mod       = 1000000007;

struct mint {
    lint v;
    lint _mod;
    mint() : v(0) {}
    mint(signed v, lint _mod = mod) : v(v), _mod(_mod) {}
    mint(lint t, lint _mod = mod) : _mod(_mod) {
        v = t % _mod;
        if (v < 0)
            v += _mod;
    }

    mint pow(lint k) {
        mint res(1), tmp(v);
        while (k) {
            if (k & 1)
                res *= tmp;
            tmp *= tmp;
            k >>= 1;
        }
        return res;
    }
    static mint add_identity() { return mint(0); }
    static mint mul_identity() { return mint(1); }
    mint inv() { return pow(_mod - 2); }

    mint &operator+=(mint a) {
        v += a.v;
        if (v >= _mod)
            v -= _mod;
        return *this;
    }
    mint &operator-=(mint a) {
        v += _mod - a.v;
        if (v >= _mod)
            v -= _mod;
        return *this;
    }
    mint &operator*=(mint a) {
        v = v * a.v % _mod;
        return *this;
    }
    mint &operator/=(mint a) { return (*this) *= a.inv(); }

    mint operator+(mint a) const { return mint(v) += a; };
    mint operator-(mint a) const { return mint(v) -= a; };
    mint operator*(mint a) const { return mint(v) *= a; };
    mint operator/(mint a) const { return mint(v) /= a; };

    mint operator-() const { return v ? mint(_mod - v) : mint(v); }

    bool operator==(const mint a) const { return v == a.v; }
    bool operator!=(const mint a) const { return v != a.v; }
    bool operator<(const mint a) const { return v < a.v; }
};
ostream &operator<<(ostream &os, mint m) { return os << m.v; }

template <size_t N, typename R>
struct SquareMatrix {
    using arr = array<R, N>;
    using mat = array<arr, N>;
    mat dat;

    SquareMatrix() {
        for (size_t i = 0; i < N; i++)
            for (size_t j = 0; j < N; j++)
                dat[i][j] = R::add_identity();
    }
    SquareMatrix &operator=(const SquareMatrix &a) {
        dat = a.dat;
        return (*this);
    }
    bool operator==(const SquareMatrix &a) const { return dat == a.dat; }

    size_t size() const { return N; };
    arr &operator[](size_t k) { return dat[k]; };
    const arr &operator[](size_t k) const { return dat[k]; };

    static SquareMatrix add_identity() { return SquareMatrix(); }
    static SquareMatrix mul_identity() {
        SquareMatrix res;
        for (size_t i = 0; i < N; i++)
            res[i][i] = R::mul_identity();
        return res;
    }

    SquareMatrix operator*(const SquareMatrix &B) const {
        SquareMatrix res;
        for (size_t i = 0; i < N; i++)
            for (size_t j = 0; j < N; j++)
                for (size_t k = 0; k < N; k++)
                    res[i][j] = res[i][j] + (dat[i][k] * B[k][j]);
        return res;
    }

    SquareMatrix operator+(const SquareMatrix &B) const {
        SquareMatrix res;
        for (size_t i = 0; i < N; i++)
            for (size_t j = 0; j < N; j++)
                res[i][j] = dat[i][j] + B[i][j];
        return res;
    }

    SquareMatrix pow(long long n) const {
        SquareMatrix a = *this, res = mul_identity();
        while (n) {
            if (n & 1)
                res = res * a;
            a = a * a;
            n >>= 1;
        }
        return res;
    }
};

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    lint l, a, b;
    cin >> l >> a >> b >> mod;
    // mod = 1000000000;
    vector<lint> ls(19, 0);
    lint tens = 10;
    for (int i = 1; i <= 18; ++i) {
        if (tens >= a)
            ls[i] = (tens - a + b - 1) / b;
        tens *= 10;
    }
    SquareMatrix<3, mint> mat, tot;
    mat[0][0] = 10;
    mat[0][1] = mat[1][1] = mat[1][2] = mat[2][2] = 1;
    tot[0][0] = tot[1][1] = tot[2][2] = 1;
    mint t                            = 10;
    for (int i = 0; i <= 18; ++i) {
        if (ls[i + 1] > l)
            ls[i + 1] = l;
        mat[0][0] = t;
        tot       = mat.pow(ls[i + 1] - ls[i]) * tot;
        t *= 10;
        if (ls[i + 1] == l)
            break;
    }
    cout << tot[0][1] * a + tot[0][2] * b << "\n";
    return 0;
}

Measured memory_bytes: 256