#include #include #include using namespace atcoder; using mint = modint1000000007; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf 1000000000000000 int main(){ int _t; cin>>_t; rep(_,_t){ long long a,b; cin>>a>>b; double A = log10(a); A *= b; long long z = floor(A); A -= z; long long x=1,y=0; for(int i=1;i<10;i++){ rep(j,10){ if(abs(log10(i + ((double)j/10.0))-A) < abs(log10(x + ((double)y/10.0))-A)){ x = i,y = j; } } } cout<