以下是一个格式清晰、易读的99乘法表：

```
1 × 1 = 1

1 × 2 = 2    2 × 2 = 4

1 × 3 = 3    2 × 3 = 6    3 × 3 = 9

1 × 4 = 4    2 × 4 = 8    3 × 4 = 12   4 × 4 = 16

1 × 5 = 5    2 × 5 = 10   3 × 5 = 15   4 × 5 = 20   5 × 5 = 25

1 × 6 = 6    2 × 6 = 12   3 × 6 = 18   4 × 6 = 24   5 × 6 = 30   6 × 6 = 36

1 × 7 = 7    2 × 7 = 14   3 × 7 = 21   4 × 7 = 28   5 × 7 = 35   6 × 7 = 42   7 × 7 = 49

1 × 8 = 8    2 × 8 = 16   3 × 8 = 24   4 × 8 = 32   5 × 8 = 40   6 × 8 = 48   7 × 8 = 56   8 × 8 = 64

1 × 9 = 9    2 × 9 = 18   3 × 9 = 27   4 × 9 = 36   5 × 9 = 45   6 × 9 = 54   7 × 9 = 63   8 × 9 = 72   9 × 9 = 81
```

这个乘法表以金字塔形式排列，每一行表示从1到该行对应的最大数字的乘法结果，格式对齐，便于阅读和记忆。