As already said, the base power would be 184. However, that doesn't tell you how much damage...

The formula is:

```
BaseDamage = ((((2 × Level) ÷ 5 + 2) * BasePower * [Sp]Atk) ÷ [Sp]Def) ÷ 50 + 2
```

Plugging in your stuff...

16.8 * 1.2 * 87 /Defense/50 + 2

*Damage: 35.0784/Defense+2*