**Step 1** |

The number given to us is: 418587. |

**Step 2** |

Let us start by looking at the right most digit, that is, at the ones' place. |

**Step 3** |

The number at the ones' place is 7. |

**Step 4** |

The number at the tens' place is 8. We found our first 8. Since it is found at the tens' place, the face value is 8 * 10. That is, the face value is 80. |

**Step 5** |

The number at the hundreds' place is 5. |

**Step 6** |

The number at the thousands' place is 8. We found our second 8. Since it is found at the thousands' place, the face value is 8 * 1000. That is, the face value is 8000. |

**Step 7** |

The difference between the place values of the two 8s = 8000 - 80 = 7920 |