The value of the number, like "50". You can use operators like
"+" and "-" to handle calculations. For example,
"10 + [a] * (2 / [b])" is a valid calculation.

Number operators
Operator | Description | Usage |

+ |
Sum a number |
value="[a] + 4" |

- |
Subtract a number |
value="[a] - 3" |

* |
Multiply a number |
value="[a] * [b]" |

/ |
Divide a number |
value="[a] / 2" |

^ |
Raise a number to the power of an exponent |
value="[a] ^ 2" |

Sample:

```
<text>You see a big treasure and stuff yourself
```

with 50 gold coins.

</text>

<state name="treasureChestEmpty" />

<**number** name="gold" *value*="[gold] + 50" />

<choice station="back">Close treasure chest</choice>