For 7|7aaa, I use: sage:print[a for a in [0..9] if (7000+111*a)%7==0] [0, 7] I do not know how to write for 7|7abc. Thanks.

1 | initial version | Anonymous |

For 7|7aaa, I use: sage:print[a for a in [0..9] if (7000+111*a)%7==0] [0, 7] I do not know how to write for 7|7abc. Thanks.

2 | No.2 Revision |

For 7|7aaa, I ~~use:
~~use:

```
sage:print[a for a in [0..9] if (7000+111*a)%7==0]
[0, 7]
```

I do not know how to write for 7|7abc. Thanks.

3 | No.3 Revision |

~~For 7|7aaa, ~~To find numbers of the form 7aaa that are multiples of 7, I use:

~~sage:print[a ~~sage:print [a for a in [0..9] if (7000+111*a)%7==0]
[0, 7]

I do not know how to write for ~~7|7abc.
~~7|7abc.

Thanks.

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