Ben needs to choose a shirt, a tie and a jacket to wear.
In his wardrobe, he owns the following clothes.
Which two of these show a way to calculate the number of different combinations that Ben can wear?
| `3 + 2 xx 3` | `3 xx 2 xx 3` | `2 + 3 + 3` | `2 xx 3 xx 3` |
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