7-1 sdut-常用类-骄傲的代价 (10 分)

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long t=sc.nextLong();
		for(int i=0;i<t;i++) {
			BigInteger a=sc.nextBigInteger();
			BigInteger b=sc.nextBigInteger();
		    System.out.println(a+"+"+b+"="+a.add(b));
		    System.out.println(a+"-"+b+"="+a.subtract(b));
		    System.out.println(a+"*"+b+"="+a.multiply(b));
		    System.out.println(a+"/"+b+"="+a.divide(b));
		    System.out.println(a+"%"+b+"="+a.mod(b));
		}
	    sc.close();
	}
	}