cannot store 33.33333333 in float64

### Module version
```
1.15.1
```

### Relevant provider source code
```go
// schema
Parameters: []function.Parameter{
function.Float64Parameter{
Name: "number",
Description: "Input number parameter for determining the rounding.",
},
},
// go type reflection
var inputNum float64

resp.Error = req.Arguments.Get(ctx, &inputNum)
```

### Terraform Configuration Files
Please see mschuchard/terraform-provider-stdlib#2

### Debug Output
upon request

### Expected Behavior
The return of `100 / 3` in HCL2 is valid as a `float64` `tftype`.

I am unsure whether this is an issue in my provider, `tftypes`, terraform core, or `go-cty`, and so I am filing this issue here first for feedback since my suspicion is the issue is related to the return type of the `/` operator, and therefore most likely `tftypes` or `go-cty` in that order.

### Actual Behavior
Please see mschuchard/terraform-provider-stdlib#2

### Steps to Reproduce
n/a

### References
linked above