diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ff84bbf
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 李光春
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 32f50ce..bca3ac7 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 <a href="https://www.dtapp.net/">Golang Decimal</a>
 </h1>
 
-📦 Golang Decimal
+📦 Golang 小数点处理
 
 [comment]: <> (go)
 [![godoc](https://pkg.go.dev/badge/github.com/dtapps/godecimal?status.svg)](https://pkg.go.dev/github.com/dtapps/godecimal)
@@ -10,8 +10,27 @@
 [![goreportcard.com](https://goreportcard.com/badge/github.com/dtapps/godecimal)](https://goreportcard.com/report/github.com/dtapps/godecimal)
 [![deps.dev](https://img.shields.io/badge/deps-go-red.svg)](https://deps.dev/go/github.com%2Fdtapps%2Fgodecimal)
 
-#### 安装使用
+#### 安装
 
 ```go
 go get -v -u github.com/dtapps/godecimal
+```
+
+#### 使用
+
+```go
+package main
+
+import (
+	"github.com/dtapps/godecimal"
+	"log"
+	"reflect"
+)
+
+func main() {
+	log.Println("加：", godecimal.Float64Add(10, 3), reflect.TypeOf(godecimal.Float64Add(10, 3)))
+	log.Println("减", godecimal.Float64Sub(10, 3), reflect.TypeOf(godecimal.Float64Sub(10, 3)))
+	log.Println("乘：", godecimal.Float64Mul(10, 3), reflect.TypeOf(godecimal.Float64Mul(10, 3)))
+	log.Println("除：", godecimal.Float64Quo(10, 3), reflect.TypeOf(godecimal.Float64Quo(10, 3)))
+}
 ```
\ No newline at end of file