/**
 * @brief  : c++ code for AtCoder
 * @author : rk222
 * @created: 2019.12.28 20:13:56
 */

#include <algorithm>
#include <bitset>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
using namespace std;

#define int unsigned long long

typedef unsigned long long ll;
// typedef long long ll;
typedef long double ld;
typedef pair<int, int> P;
typedef pair<int, P> P1;
typedef tuple<int, int, int> T;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<P> vp;
typedef vector<tuple<int, int, int>> vt;

#define fr first
#define sc second
#define mp make_pair
#define pb push_back
#define rep(i, x) for (int i = 0; i < x; i++)
#define rep1(i, x) for (int i = 1; i <= x; i++)
#define srep(i, s, x) for (int i = s; i < x; i++)
#define rrep(i, x) for (int i = x - 1; i >= 0; i--)
#define rrep1(i, x) for (int i = x; i > 0; i--)
#define rsrep(i, s, x) for (int i = x - 1; i >= s; i--)
#define maxs(x, y) (x = max(x, y))
#define mins(x, y) (x = min(x, y))
#define limit(x, l, r) max(l, min(x, r))
#define lims(x, l, r) (x = max(l, min(x, r)))
#define sor(v) sort(v.begin(), v.end())
#define rev(s) reverse(s.begin(), s.end())
#define lb(vec, a) lower_bound(vec.begin(), vec.end(), a)
#define ub(vec, a) upper_bound(vec.begin(), vec.end(), a)
#define uniq(vec) vec.erase(unique(vec.begin(), vec.end()), vec.end())
#define mp1(a, b, c) P1(a, P(b, c))
#define dame                                                                                  \
    puts("-1");                                                                               \
    return 0
#define yn                                                                                    \
    puts("Yes");                                                                              \
    else puts("No")
#define YN                                                                                    \
    puts("YES");                                                                              \
    else puts("NO")

template <typename A, typename B> string to_string(pair<A, B> p);
template <typename A, typename B, typename C> string to_string(tuple<A, B, C> p);
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
string to_string(const string &s) {
    return '"' + s + '"';
}
string to_string(const char *s) {
    return to_string((string)s);
}
string to_string(bool b) {
    return (b ? "true" : "false");
}
string to_string(vector<bool> v) {
    bool first = true;
    string ret = "{";
    for (int i = 0; i < static_cast<int>(v.size()); i++) {
        if (!first) {
            ret += ", ";
        }
        first = false;
        ret += to_string(v[i]);
    }
    ret += "}";
    return ret;
}
template <size_t N> string to_string(bitset<N> v) {
    string ret = "";
    for (size_t i = 0; i < N; i++) {
        ret += static_cast<char>('0' + v[i]);
    }
    return ret;
}
template <typename A> string to_string(A v) {
    bool first = true;
    string ret = "{";
    for (const auto &x : v) {
        string s = to_string(x);
        if (!first) {
            ret += ", ";
        }
        if (s[0] == '{') {
            s = "\n" + s;
        }
        first = false;
        ret += s;
    }
    if (ret[ret.size() - 1] == '}') {
        ret += "\n}";
    } else {
        ret += "}";
    }
    return ret;
}
template <typename A, typename... Lest> string to_string(A *v, int n, Lest... L) {
    bool first = true;
    string ret = "{";
    rep(i, n) {
        auto x = v[i];
        string s = to_string(x, L...);
        if (!first) {
            ret += ", ";
        }
        if (s[0] == '{') {
            s = "\n" + s;
        }
        first = false;
        ret += s;
    }
    if (ret[ret.size() - 1] == '}') {
        ret += "\n}";
    } else {
        ret += "}";
    }
    return ret;
}
template <typename A, typename B> string to_string(pair<A, B> p) {
    return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
template <typename A, typename B, typename C> string to_string(tuple<A, B, C> p) {
    return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " +
           to_string(get<2>(p)) + ")";
}
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
    return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " +
           to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")";
}
void name_disp(string s) {
    cerr << "-------" << endl;
    cerr << s << ": " << endl;
}
void val_disp() {
    cerr << endl;
}
template <typename First, typename... Lest> void val_disp(First F, Lest... L) {
    cerr << to_string(F) << endl;
    val_disp(L...);
}
template <typename A, typename... Lest> void val_disp(A *v, Lest... L) {
    cerr << to_string(v, L...) << endl;
    val_disp();
}
#define disp(...)                                                                             \
    name_disp(#__VA_ARGS__);                                                                  \
    val_disp(__VA_ARGS__)
#define adisp(a, ...)                                                                         \
    name_disp(#a);                                                                            \
    val_disp(a, __VA_ARGS__)

#ifdef int
const ll INF = 1002003004005006007ll;
#else
const int INF = 1002003004;
#endif

// const int M = 100000000;
// const int dir_4[4][2] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
// const int dir_8[8][2] = {{1, 0}, {1, 1}, {0, 1}, {-1, 1}, {-1, 0}, {-1, -1}, {0, -1}, {1,
// -1}};

/* ------------------------------------- */
ll l, a, b, M;

ll powAry[3][3] = {
    {0, 0, 0},
    {0, 0, 0},
    {0, 0, 0},
};

void powCalc(int n) { // x^n 計算量O(logn)
    ll ans[3][3] = {
        {1, 0, 0},
        {0, 1, 0},
        {0, 0, 1},
    };
    // adisp(powAry, 3, 3);
    while (n > 0) {
        if ((n & 1) == 1) {
            ll oldans[3][3];
            rep(i, 3) rep(j, 3) oldans[i][j] = ans[i][j];
            rep(i, 3) rep(j, 3) {
                ans[i][j] = 0;
                rep(k, 3) {
                    ans[i][j] += (oldans[i][k] * powAry[k][j]) % M;
                    ans[i][j] %= M;
                }
            }
        }
        ll oldpowAry[3][3];
        rep(i, 3) rep(j, 3) oldpowAry[i][j] = powAry[i][j];
        rep(i, 3) rep(j, 3) {
            powAry[i][j] = 0;
            rep(k, 3) {
                powAry[i][j] += (oldpowAry[i][k] * oldpowAry[k][j]) % M;
                powAry[i][j] %= M;
            }
        }

        n >>= 1; //桁をずらす n = n >> 1
        // disp(n);
        // adisp(powAry, 3, 3);
    }
    rep(i, 3) rep(j, 3) powAry[i][j] = ans[i][j];
}

signed main() {
    scanf("%llu%llu%llu%llu", &l, &a, &b, &M);

    ll d9 = 0;
    bool fin = false;

    ll x = 0;
    ll s = a;
    rep1(d, 18) {
        ll oldd9 = d9;
        d9 *= 10;
        d9 += 9;

        ll num2;
        if (d == 1) {
            num2 = 0;
        } else {
            if (oldd9 < a) {
                num2 = 0;
            } else {
                num2 = (oldd9 - a) / b + 1;
            }
        }
        ll num1;
        if (d9 < a) {
            num1 = 0;
        } else {
            num1 = (d9 - a) / b + 1;
        }

        if (num1 >= l) {
            fin = true;
            num1 = l;
        }

        ll cd = num1 - num2;
        // disp(d, oldd9, d9, num2, num1, cd);

        // 累乗の計算
        powAry[0][0] = pow(10, d);
        powAry[0][0] %= M;
        powAry[0][1] = 0;
        powAry[0][2] = 0;
        powAry[1][0] = 1;
        powAry[1][1] = 1;
        powAry[1][2] = 0;
        powAry[2][0] = 0;
        powAry[2][1] = b;
        powAry[2][2] = 1;
        powCalc(cd);

        ll xold = x % M;
        ll sold = s % M;
        x = (xold * powAry[0][0]) % M + (sold * powAry[1][0]) % M + (1 * powAry[2][0]) % M;
        s = (xold * powAry[0][1]) % M + (sold * powAry[1][1]) % M + (1 * powAry[2][1]) % M;

        // disp(d, cd);
        // adisp(powAry, 3, 3);

        if (fin) {
            break;
        }
    }

    printf("%llu\n", x % M);

    /* --------------------------------- */
    return 0;
};

Measured memory_bytes: 256