
计算结果例子:
1234 --- 1+2+3+4 = 10
1234 --- 3*4-1*2 = 10
6789 --- (7+8)*6/9 = 10
6789 --- 8*(9-7)-6 = 10
6789 --- 6+8/(9-7) = 10
1199 --- (1+1/9)*9 = 10

计算结果例子:
1234 --- 1+2+3+4 = 10
1234 --- 3*4-1*2 = 10
6789 --- (7+8)*6/9 = 10
6789 --- 8*(9-7)-6 = 10
6789 --- 6+8/(9-7) = 10
1199 --- (1+1/9)*9 = 10