#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000

long long get(long long N,long long K,long long C){
	long long cur = 1;
	long long ret = 0;
	rep(i,9){
		long long a = 0;
		a -= cur * C;
		ret += floor_sum(N/K+1,cur*10,K,a);
		a -= cur;
		ret -= floor_sum(N/K+1,cur*10,K,a);
		cur *= 10;
		//break;
	}
	
	return ret;
	
}

int main() {
    
	int _t;
	cin>>_t;
	
	rep(_,_t){
		long long L,R,K,C;
		cin>>L>>R>>K>>C;
		
		cout<<get(R,K,C) - get(L-1,K,C)<<endl;
	}
	
	
    return 0;
}