用于计算住房按揭贷款

输入：贷款金额、按揭期（月）数及银行利率（五年内和五年外）

输出：等额本息月供、贷款利息总额、剩余本金及支付利息金额-Used to calculate the housing mortgage loans Input: loan amount, mortgage term [months] number and bank interest rates [five years and five years apart] Output: the matching principal and interest for the month, the total amount of loan interest, and the remaining amount of principal and interest payments