#include <bits/stdc++.h>

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define FOR(i,n,m) for(int i=(int)(n); i<=(int)(m); i++)
#define RFOR(i,n,m) for(int i=(int)(n); i>=(int)(m); i--)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define RITR(x,c) for(__typeof(c.rbegin()) x=c.rbegin();x!=c.rend();x++)
#define setp(n) fixed << setprecision(n)

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }

#define ld long double
#define ll long long
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll,ll>
#define pi pair<int,int>

#define all(a) (a.begin()),(a.end())
#define rall(a) (a.rbegin()),(a.rend())
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define ins insert

using namespace std;

//-------------------------------------------------
//--ModInt
//-------------------------------------------------
::std::uint_fast64_t MOD;

class mint
{
private:
    using value_type = ::std::uint_fast64_t;
    value_type n;
public:
    mint():n(0){}
    mint(::std::int_fast64_t _n):n(_n<0 ? MOD-(-_n)%MOD : _n%MOD){}
    mint(const mint &m):n(m.n){}

    friend ::std::ostream& operator<<(::std::ostream &os, const mint &a){
		return os << a.n;
	}
    friend ::std::istream& operator>>(::std::istream &is, mint &a){
        value_type temp; is>>temp;
        a = mint(temp);
        return is;
    }

    mint& operator+=(const mint &m){n+=m.n; n=(n<MOD)?n:n-MOD; return *this;}
    mint& operator-=(const mint &m){n+=MOD-m.n; n=(n<MOD)?n:n-MOD; return *this;}
    mint& operator*=(const mint &m){n=n*m.n%MOD; return *this;}
    mint& operator/=(const mint &m){return *this*=m.inv();}
    mint& operator++(){return *this+=1;}
    mint& operator--(){return *this-=1;}

    mint operator+(const mint &m) const {return mint(*this)+=m;}
    mint operator-(const mint &m) const {return mint(*this)-=m;}
    mint operator*(const mint &m) const {return mint(*this)*=m;}
    mint operator/(const mint &m) const {return mint(*this)/=m;}
    mint operator++(int){mint t(*this); *this+=1; return t;}
    mint operator--(int){mint t(*this); *this-=1; return t;}

    mint operator==(const mint &m) const {return n==m.n;}
    mint operator!=(const mint &m) const {return n!=m.n;}
    mint operator-() const {return mint(MOD-n);}

    mint pow(value_type b) const {
        mint ret(1), m(*this);
        while(b){
            if (b & 1) ret*=m;
            m*=m;
            b>>=1;
        }
        return ret;
    }

    mint inv() const {return pow(MOD-2);}
};

//-------------------------------------------------

mint f(ll t, mint &c){
    if (t==0) return 0;
    if (t&1){
        return f(t-1,c)*c+1;
    }else{
        t/=2;
        return f(t,c)*(c.pow(t)+1);
    }
}

mint g(ll t, mint &c){
    if (t==0) return 0;
    if (t&1){
        return g(t-1,c)*c+t-1;
    }else{
        t/=2;
        return g(t,c)*(c.pow(t)+1)+f(t,c)*t;
    }
}

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll l,a,b; cin>>l>>a>>b>>MOD;
    vll p10(19);
    p10[0] = 1;
    rep(i,18) p10[i+1]=p10[i]*10;
    mint ans = 0;
    FOR(d,1,18){
        mint A;
        mint B=b;
        ll T;
        ll mi = p10[d-1];
        ll ma = p10[d]-1;
        if (a+(l-1)*b<mi) continue;
        if (a>ma) continue;
        ll left = max((mi-a+b-1)/b, 0ll);
        ll right = min((ma-a)/b, l-1);
        A = mint(a)+mint(left)*mint(b);
        T = right-left+1;
        mint c = mint(p10[d]);
        ans *= c.pow(T);
        ans += A*f(T, c) + B*g(T, c);
    }
    cout<<ans<<endl;
    return 0;
}


Measured memory_bytes: 256