package main
import (
  "fmt"
  "math"
)
func get_pmt(f_interest_rate float64, term_number int, principal int) float64 {
 compound_rate := math.Pow(1 + f_interest_rate, float64(term_number))
 pmt := float64(principal) * f_interest_rate * compound_rate / (compound_rate - 1)
 return pmt
}
func main(){
 n := 360
 year_month := 12
 p := 100
 r1 := float64(0.0490) / float64(year_month)
 r2 := float64(0.0325) / float64(year_month)
 a := get_pmt(r1, n, p) * float64(n) - float64(p)
 b := get_pmt(r2, n, p) * float64(n) - float64(p)
 fmt.Println(a, b)
}

package main
import (
  "fmt"
  "math"
)
func get_pmt(f_interest_rate float64, term_number int, principal int) float64 {
 compound_rate := math.Pow(1 + f_interest_rate, float64(term_number))
 pmt := float64(principal) * f_interest_rate * compound_rate / (compound_rate - 1)
 return pmt
}
func get_month_provide(price int) {
 n := 360
 year_month := 12
 gongjijin_loan_limit := 900000
 shoufu_rate := 0.3
 r1 := float64(0.0490) / float64(year_month)
 r2 := float64(0.0325) / float64(year_month)
 month_provide := get_pmt(r2, n, gongjijin_loan_limit) 
 month_provide += get_pmt(r1, n, int(float64(price) * (float64(1) - float64(shoufu_rate)) - float64(gongjijin_loan_limit)) )
 fmt.Println(month_provide)
}
func main(){
 get_month_provide(4500000)
 get_month_provide(5000000)
}