如何覆盖重载变量

i'm experimenting with go with pi calculating formulas, and made this:

package main

import (
    "fmt"
    "math"
)

func bbpformula() {

    var result float64

    for k := 0.0; k <= 100; k++ {

            result += (1 / math.Pow(16.0, k) * ((4 / (8*k + 1)) - (2 / (8*k + 4)) - (1 / (8*k + 5)) - (1 / (8*k + 6))))

    }

    fmt.Println(result)

}

func main() {

    bbpformula()

}

and the output is:

3.141592653589793

However, i would like more digits, i tried using the math/big package to make the variables big.Float with simpler formulas, but the arithmetic operations were extremely confusing and slow.

So my idea is overwriting the result variable when its overloaded (maximum capacity), but i have no ideia how to do that!

Could someone please explain to me how that is done?

edit: tried to use the if result > math.MaxFloat64 but the output turns into nothing

import (
    "fmt"
    "math"
)

func bbpformula() {

    var result float64
    var resultb float64

    for k := 0.0; k <= 100; k++ {

            result += (1 / math.Pow(16.0, k) * ((4 / (8*k + 1)) - (2 / (8*k + 4)) - (1 / (8*k + 5)) - (1 / (8*k + 6))))
            if result > math.MaxFloat64 {
                    fmt.Println(result)
                    resultb += (1 / math.Pow(16.0, k) * ((4 / (8*k + 1)) - (2 / (8*k + 4)) - (1 / (8*k + 5)) - (1 / (8*k + 6))))
                    if resultb == math.MaxFloat64 {
                            fmt.Println(resultb)
                            result = 0
                    }

            }

    }

}

func main() {

    bbpformula()

}

output:

Try using MaxFloat32 or MaxFloat64 in the math package. Like, check if result > math.MaxFloat64?