Look at this diagram, which shows two-fifths of a rectangle shaded.

Let's multiply two-fifths by 2.

This will give 2 lots of two-fifths.

2 | + | 2 | = | 4 |

5 | 5 | 5 |

This gives four-fifths shaded as shown.

So

2 | × | 2 | = | 4 |

5 | 5 |

Now let's multiply two-fifths by 3.

This will be 3 lots of two-fifths.

2 | + | 2 | + | 2 | = | 6 |

5 | 5 | 5 | 5 |

This gives six-fifths shaded as shown.

So

3 | × | 2 | = | 6 | = | 1 | 1 |

5 | 5 | 5 |