//将超过万/亿的数字加上万/亿的单位
    getNum() {
      for (let i of this.paymentDiv) {
        //math.floor 就是去除小数点向下取整 math.floor(3.84) = 3
        //x.toString() 就是把x变成字符串
        let num1 = Math.floor(i.today).toString();
        //如果num1长度大于4(num1是万级别的)
        if (num1.length > 4) {
          //如果num1长度大于8(num1是亿级别的)
          if (num1.length > 8) {
            //num1除以1亿再取整得到的数字再加'亿'
            let num2 = Math.floor(num1 / 100000000);
            i.total = num2 + "亿";
          } else {
            //num1除以1亿再取整得到的数字再加'万'
            let num2 = Math.floor(num1 / 10000);
            i.total = num2 + "万";
          }
        }
      }
    },