#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <assert.h>
#include <ctype.h>
#include <map>
#include <string>
#include <set>
#include <bitset>
#include <utility>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <iostream>
#include <fstream>
#include <list>
using namespace std;
const int MAXL = 200;
struct BigNum
{
int num[MAXL];
int len;
};
//高精度比较 a > b return 1, a == b return 0; a < b return -1;
int Comp(BigNum &a, BigNum &b)
{
int i;
if(a.len != b.len) return (a.len > b.len) ? 1 : -1;
for(i = a.len-1; i >= 0; i--)
if(a.num[i] != b.num[i]) return (a.num[i] > b.num[i]) ? 1 : -1;
return 0;
}
//高精度加法
BigNum Add(BigNum &a, BigNum &b)
{
BigNum c;
int i, len;
len = (a.len > b.len) ? a.len : b.len;
memset(c.num, 0, sizeof(c.num));
for(i = 0; i < len; i++)
{
c.num[i] += (a.num[i]+b.num[i]);
if(c.num[i] >= 10)
{
c.num[i+1]++;
c.num[i] -= 10;
}
}
if(c.num[len]) len++;
c.len = len;
return c;
}
//高精度减法,保证a >= b
BigNum Sub(BigNum &a, BigNum &b)
{
BigNum c;
int i, len;
len = (a.len > b.len) ? a.len : b.len;
memset(c.num, 0, sizeof(c.num));
for(i = 0; i < len; i++)
{
c.num[i] += (a.num[i]-b.num[i]);
if(c.num[i] < 0)
{
c.num[i] += 10;
c.num[i+1]--;
}
}
while(c.num[len] == 0 && len > 1) len--;
if(c.num[len]) len++;
c.len = len;
return c;
}
//高精度乘以高精度
BigNum Mul(BigNum &a, BigNum &b)
{
int i, j, len = 0;
BigNum c;
memset(c.num, 0, sizeof(c.num));
for(i = 0; i < a.len; i++)
for(j = 0; j < b.len; j++)
{
c.num[i+j] += (a.num[i]*b.num[j]);
if(c.num[i+j] >= 10)
{
c.num[i+j+1] += c.num[i+j]/10;
c.num[i+j] %= 10;
}
}
len = a.len+b.len-1;
while(c.num[len-1] == 0 && len > 1) len--;
if(c.num[len]) len++;
c.len = len;
return c;
}
//高精度*10
void Mul10(BigNum &a)
{
int i, len = a.len;
for(i = len; i >= 1; i--)
a.num[i] = a.num[i-1];
a.num[i] = 0;
len++;
//if a == 0
while(len > 1 && a.num[len-1] == 0) len--;
if(a.num[len]) len++;
a.len = len;
}
//高精度除以高精度，除的结果为c，余数为f
void Div(BigNum &a, BigNum &b, BigNum &c, BigNum &f)
{
int i, len = a.len;
memset(c.num, 0, sizeof(c.num));
memset(f.num, 0, sizeof(f.num));
f.len = 1;
for(i = len-1;i >= 0;i--)
{
Mul10(f);
//余数每次乘10
f.num[0] = a.num[i];
//然后余数加上下一位
///利用减法替换除法
while(Comp(f, b) >= 0)
{
f = Sub(f, b);
c.num[i]++;
}
}
while(len > 1 && c.num[len-1] == 0)len--;
if(c.num[len]) len++;
c.len = len;
}
void print(BigNum &a, int tag)
{
if(a.len == 1 && a.num[0] == 0)
{
puts("0");
}
else
{
if(tag < 0) putchar('-');
int i;
for(i = a.len-1; i >= 0; i--)
printf("%d", a.num[i]);
puts("");
}
}
// 输出商和余数
void print(BigNum &c, BigNum &f, int tag)
{
if(c.len == 1 && c.num[0] == 0)
{
printf("0");
}
else
{
if(tag < 0) putchar('-');
int i;
for(i = c.len-1; i >= 0; i--)
printf("%d", c.num[i]);
}
printf(" ");
print(f,1);
}
void Init(BigNum &a, char *s, int &tag)
{
memset(a.num,0,sizeof(a.num));
int i = 0, j = strlen(s);
if(s[0] == '-') {j--; i++; tag *= -1;}
a.len = j;
for(; s[i] != '\0'; i++, j--)
a.num[j-1] = s[i]-'0';
//print(a);
}
void work(BigNum &a,int &atag,BigNum &b,int &btag)
{
BigNum tmp1;
memset(tmp1.num,0,sizeof(tmp1.num));
if(atag == 1 && btag == 1)// ++
{
tmp1 = Add(a, b);
a = Mul(a, b);
if (Comp(tmp1, a) == 1)
{
a = tmp1;
}
print(a, 1);
}else if(atag == 1 && btag == -1)// +-
{
a = Add(a, b);
print(a, 1);
}else if(atag == -1 && btag == 1)// -+
{
if(b.len == 1 && b.num[0] == 0)
{
a.len = 1;
a.num[0] = 0;
print(a, 1);
}
else
{
if (Comp(b, a) >= 0)
{
a = Sub(b, a);
print(a, 1);
}
else
{
tmp1 = Sub(a, b);
BigNum c, f;
Div(a, b, c, f);
if (Comp(tmp1, c) == -1)
{
print(tmp1, -1);
}
else
{
print(c, f, -1);
}
}
}
}else// --
{
a = Mul(a, b);
print(a, 1);
}
}
int main()
{
BigNum a, b;
char s1[100], s2[100];
int n;
scanf("%d", &n);
for(int i=0;i<n;i++)
{
if(scanf("%s %s", s1, s2) != EOF)
{
int atag = 1;
int btag = 1;// 两个数的符号
Init(a, s1, atag);
Init(b, s2, btag);
work(a, atag, b, btag);
}
}
return 0;
}
