#include<iostream>
using namespace std;
int main(){
	int n;
	char state; 
	cin>>n;
	for(int i=0;i<n;i++){
		int n1,n2;
		char a1;
		cin>>a1;
		char a11=a1;
		if(a1!='a'&&a1!='b'&&a1!='c'){
			cin>>n1;
			n1=(a1-48)*100+n1;
			cin>>n2;
		}else{
			state=a1;
			cin>>n1 >>n2;
		}
			if(state=='a'){
			printf("%d+%d=%d\n",n1,n2,(n1+n2));int num=2;int num1=n1+n2;
				do{
					n1/=10;num++;				
				}while(n1!=0);
				do{
					n2/=10;num++;				
				}while(n2!=0);
				do{
					(num1)/=10;num++;				
				}while(num1!=0);
			printf("%d\n",num);
			}
			if(state=='b'){
			printf("%d-%d=%d\n",n1,n2,(n1-n2));int num=2;int num1=n1-n2;
				do{
					n1/=10;num++;				
				}while(n1!=0);
				do{
					n2/=10;num++;				
				}while(n2!=0);
				do{
					(num1)/=10;num++;
						if(num1<0)num++;					
				}while(num1!=0);
			printf("%d\n",num);
			}
			if(state=='c'){
			printf("%d*%d=%d\n",n1,n2,(n1*n2));int num=2;long long int num1=n1*n2;
				do{
					n1/=10;num++;
				
				}while(n1!=0);
				do{
					n2/=10;num++;
								
				}while(n2!=0);
				do{
					(num1)/=10;num++;
					
				}while(num1!=0);
			printf("%d\n",num);
			}
		
	}

	return 0;
}

只过了3个测试点，求大佬帮忙看看问题，感激不尽！