::: {.cell hash='02_R_introduction_cache/revealjs/unnamed-chunk-117_dbb354dfe41cba782b75f6caa9a67689'}

```{.r .cell-code}
a %*% solve(a)
```

::: {.cell-output .cell-output-stdout}
```
     [,1] [,2]
[1,]    1    0
[2,]    0    1
```
:::
:::