#include <bits/stdc++.h>
using namespace std;

typedef long long               ll;
typedef long double             ld;


#define fastio           ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define si(a)            scanf("%d", &a)
#define si2(a,b)         scanf("%d %d", &a,&b)
#define sll(a)           scanf("%I64d",&a)
#define sll2(a,b)        scanf("%I64d %I64d",&a,&b)
#define pb               push_back
#define pi(a)            printf("%d",int(a))
#define pll(a)           printf("%I64d",ll(a))
#define all(x)           (x).begin(),(x).end()
#define rall(x)          (x).rbegin(),(x).rend()
#define ps               printf(" ")
#define nln              printf("\n")
#define ff               first
#define ss               second
#define vi               vector<int>
#define vll              vector<ll>
#define vstr             vector<string>
#define vc               vector<char>
#define pii              pair<int,int>
#define PLL              pair<ll,ll>
#define PI               acos(-1)
#define sq(x)            x*x
#define forr(i,a,b)      for(ll i=ll(a);i<ll(b);i++)
#define forn(i,a,b)      for(ll i=ll(a);i>ll(b);i--)
#define max3(a,b,c)      max(a,max(b,c))
#define max4(a,b,c,d)    max(max3(a,b,c),d)
#define min3(a,b,c)      min(a,min(b,c))
#define mod              1000000007
#define pinf             9223372036854775807
#define minf             -9223372036854775807


ll power(ll b,ll n)
{
    if(b==0 && n==0) return -1;
    if(b==0 || b==1) return b;
    if(n==0) return 1;
    else if(n%2) return b*sq(power(b,n/2));
    else return sq(power(b,n/2));
}

void fileio()
{
    #ifndef ONLINE_JUDGE
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
    #endif
}


int solve()
{
    ll t;
    sll(t);
    while(t--)
    {
        ll l,r,g;
        sll2(l,r);
        sll(g);
        ll temp1,temp2;
        temp1=(l-1)/g;
        temp2=r/g;
        ll ans=temp2-temp1;
        pll(ans);
        nln;
    }


}

int main()
{
    fileio();
    solve();
}


///    Before submission=>
///    ***check for integer overflow,array bounds
///    ***check for n=1