打印九九乘法表

打印如上乘法口诀表，python代码如下

for row in range(1, 10):
    for col in range(1, 10 - row):
        print(' ' * 12, end='')
    for col in range(row, 0, -1):
        print(str(col) + ' * ' + str(row) + ' = ' + str(row * col) + ' ', end=' ')
    print()