#include <bits/stdc++.h>

//    #include <boost/multiprecision/cpp_int.hpp>
 #define int long long
 #define inf  1000000007
 #define pa pair<int,int>
 #define ll long long
 #define pal pair<double,double>
 #define ppap pair<pa,int>
  #define PI 3.14159265358979323846
  #define paa pair<int,char>
  #define  mp make_pair
  #define  pb push_back
  #define EPS (1e-10)
                                          
    int dx[8]={0,1,0,-1,1,1,-1,-1};
    int dy[8]={1,0,-1,0,-1,1,1,-1};
                                            using namespace std;
                                   			class pa3{
                                            	public:
                                            	int x;
                                   				int y,z;
                                            	pa3(int x=0,int y=0,int z=0):x(x),y(y),z(z) {}
                                            	bool operator < (const pa3 &p) const{
                                            		if(x!=p.x) return x<p.x;
                                            		if(y!=p.y) return y<p.y;
                                            		 return z<p.z;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                   				bool operator > (const pa3 &p) const{
                                            		if(x!=p.x) return x>p.x;
                                            		if(y!=p.y) return y>p.y;
                                            		 return z>p.z;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa3 &p) const{
                                            		return x==p.x && y==p.y && z==p.z;
                                            	}
                                            		bool operator != (const pa3 &p) const{
                                            			return !( x==p.x && y==p.y && z==p.z);
                                            	}
                                            
                                            };
                                            
                                            class pa4{
                                            	public:
                                            	int x;
                                            	int y,z,w;
                                            	pa4(int x=0,int y=0,int z=0,int w=0):x(x),y(y),z(z),w(w) {}
                                            	bool operator < (const pa4 &p) const{
                                            		if(x!=p.x) return x<p.x;
                                            		if(y!=p.y) return y<p.y;
                                            		if(z!=p.z)return z<p.z;
                                            		return w<p.w;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator > (const pa4 &p) const{
                                            		if(x!=p.x) return x>p.x;
                                            		if(y!=p.y) return y>p.y;
                                            		if(z!=p.z)return z>p.z;
                                            		return w>p.w;
                                            		//return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa4 &p) const{
                                            		return x==p.x && y==p.y && z==p.z &&w==p.w;
                                            	}
                                            		
                                            
                                            };
                                            class pa2{
                                            	public:
                                            	int x,y;
                                            	pa2(int x=0,int y=0):x(x),y(y) {}
                                            	pa2 operator + (pa2 p) {return pa2(x+p.x,y+p.y);}
                                            	pa2 operator - (pa2 p) {return pa2(x-p.x,y-p.y);}
                                            	bool operator < (const pa2 &p) const{
                                            		return y != p.y ? y<p.y: x<p.x;
                                            	}
                                            	bool operator > (const pa2 &p) const{
                                            		return x != p.x ? x<p.x: y<p.y;
                                            	}
                                            	bool operator == (const pa2 &p) const{
                                            		return abs(x-p.x)==0 && abs(y-p.y)==0;
                                            	}
                                            	bool operator != (const pa2 &p) const{
                                            		return !(abs(x-p.x)==0 && abs(y-p.y)==0);
                                            	}
                                            		
                                            
                                            };
                                            

                      
                                string itos( int i ) {
                                ostringstream s ;
                                s << i ;
                                return s.str() ;
                                }
                                 
                                int gcd(int v,int b){
                                	if(v>b) return gcd(b,v);
                                	if(v==b) return b;
                                	if(b%v==0) return v;
                                	return gcd(v,b%v);
                                }
                 
                            
                                int mod;
int extgcd(int a, int b, int &x, int &y) {
    if (b == 0) {
        x = 1;
        y = 0;
        return a;
    }
    int d = extgcd(b, a%b, y, x);
    y -= a/b * x;
    return d;
}
pa operator+(const pa & l,const pa & r) {   
    return {l.first+r.first,l.second+r.second};                                    
}    
pa operator-(const pa & l,const pa & r) {   
    return {l.first-r.first,l.second-r.second};                                    
}  
                                
                int pr[1200010];
                int inv[1200010];
                
                int beki(int wa,int rr,int warukazu){
                	if(rr==0) return 1%warukazu;
                	if(rr==1) return wa%warukazu;
                	wa%=warukazu;
                	if(rr%2==1) return ((ll)beki(wa,rr-1,warukazu)*(ll)wa)%warukazu;
                	ll zx=beki(wa,rr/2,warukazu);
                	return (zx*zx)%warukazu;
                }

                
    			int comb(int nn,int rr){
    				if(rr<0 || rr>nn || nn<0) return 0;
    				int r=pr[nn]*inv[rr];
    				r%=mod;
    				r*=inv[nn-rr];
    				r%=mod;
    				return r;
    			}
                
                void gya(int ert){
                	pr[0]=1;
                	for(int i=1;i<=ert;i++){
                		pr[i]=(pr[i-1]*i)%mod;
                	}
                		inv[ert]=beki(pr[ert],mod-2,mod);
                	for(int i=ert-1;i>=0;i--){
                		inv[i]=inv[i+1]*(i+1)%mod;
                	}
                }
                
              //   cin.tie(0);
    		//	ios::sync_with_stdio(false);
    			//priority_queue<pa3,vector<pa3>,greater<pa3>> pq;            
                 //sort(ve.begin(),ve.end(),greater<int>());
//    mt19937(clock_per_sec);
  //  mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()) ;
      
       
       
                               //----------------kokomade tenpure------------



	int ju(int x,int y){// 10^(x*y)
		
		//10^x
		int g=beki(10,x,mod)%mod;
		
		return beki(g,y,mod);
		
	}


int f(int kosu,int haba){
	if(kosu==1) return 1;
	if(kosu%2){
		int ue=f(kosu-1,haba);
		ue*=beki(10,haba,mod);
		ue%=mod;
		ue++;
		return ue%mod;
	}
	
	int han=f(kosu/2,haba);
	int kake=1+ju(haba,kosu/2);
	kake%=mod;
	return han*kake%mod;
}

int er(int sho,int sa,int kou,int keta){
	if(kou==1) return sho%mod;
	
	if(kou%2){
		int las=sho+sa*(kou-1);
		int g=er(sho,sa,kou-1,keta);
		
		int w=beki(10,keta,mod);
		
		return (g*w%mod+las)%mod;
		
	}
	
	int mae=er(sho,sa,kou/2,keta);
	
	int ue=mae*ju(keta,kou/2)%mod;
	int sita1=mae;
	int sita2=sa*(kou/2)%mod*f(kou/2,keta)%mod;
	
	return (ue+sita1+sita2)%mod;
	
}


 signed main(){
 	
 
    	       cin.tie(0);
   			ios::sync_with_stdio(false);

int l,a,b;
 	cin>>l>>a>>b>>mod;
 	
 	int F[20];
 	
 	pa H[20];
 	F[1]=1;
 	for(int i=2;i<=19;i++)F[i]=F[i-1]*10;
 	
 	for(int i=1;i<=18;i++){
 		if(F[i+1]-1-a <0 ){
 			H[i]={-1,-1};
 			continue;
 		}
 		
 		int ue=(F[i+1]-1-a)/b;
 		
 		int si;
 		if(F[i]-a<0) si=0;
 		else si=(F[i]-a)/b + !!((F[i]-a)%b);
 	//	cout<<i<<" "<<si<<endl;
 		if(si>=l){
 			H[i]={-1,-1};
 			continue;
 		}
 		if(si>ue){
 			H[i]={-1,-1};
 			continue;
 		}
 		ue=min(ue,l-1);
 		
 		H[i]={si,ue};
 	}
 	
 	for(int i=1;i<=18;i++){
 //		cout<<i<<" "<<H[i].first<<" "<<H[i].second<<endl;
 	}

 	  
  int ans=0;
  
  int sita=1;
	for(int i=18;i>0;i--){
		if(H[i].first==-1) continue;
		
		int mi=a+b*H[i].first;
		
		ans+= sita*er(mi,b,H[i].second-H[i].first+1,i)%mod;
		ans%=mod;
		
		
		
		sita*= ju(i,H[i].second-H[i].first+1);
		sita%=mod;
	}
  
  cout<<ans<<endl;
 	return 0;
 
  }
  


  

Measured memory_bytes: 256