#include <iostream>
using namespace std;
 
int main() {
    int t;
    cin >> t;
 
    while (t--) {
        long long l, r, k;
        cin >> l >> r >> k;
 
        if (l == r) {
            if (k >= 1) {
                cout << 1 << endl;
            } else {
                cout << 0 << endl;
            }
        } else {
            long long count = (r - l + 1) / k;
            cout << count << endl;
        }
    }
 
    return 0;
}

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8
3 9 2
4 9 1
7 9 2
2 10 2
154 220 2
147 294 2
998 24435 3
1 1000000000 2