!16 update dde-calendar

From: @shilei_522 
Reviewed-by: @panchenbo 
Signed-off-by: @panchenbo

README.en.md

@@ -1,22 +1,20 @@
 # dde-calendar
 
 #### Description
-dde calendar
+dde calendar:Calculator is a powerful desktop calculator that supports standard mode, Scientific mode and Programmer mode. Perfect support for keyboard input, in the keyboard input also support symbol fault tolerance and calculation result linkage.
 
 #### Software Architecture
 Software architecture description
 
 #### Installation
 
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-2.  xxxx
-3.  xxxx
+1.  dnf install dde-calendar
 
 #### Instructions
 
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+1.  Select **standard ** to switch to the standard mode screen and perform basic addition, subtraction, multiplication and division operations.
+2.  Select  **science **, switch to the Science mode interface, and perform advanced operations such as functions, exponentials, and roots.
+3.   Select **programmer **, switch to programmer mode interface, perform binary, octal, decimal, hexadecimal and other complex operations.
 
 #### Contribution
 

README.md

@@ -1,7 +1,7 @@
 # dde-calendar
 
 #### 介绍
-dde calendar
+dde calendar：计算器是一款功能强大的桌面计算器，支持标准模式、科学模式和程序员模式。完美支持键盘输入，在键盘输入时还支持符号容错及计算结果联动
 
 #### 软件架构
 软件架构说明
@@ -9,15 +9,13 @@ dde calendar
 
 #### 安装教程
 
-1.  xxxx
-2.  xxxx
-3.  xxxx
+1.  dnf install dde-calendar
 
 #### 使用说明
 
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-3.  xxxx
+1.  选择 **标准**，切换到标准模式界面，执行基本的加减乘除运算。
+2.  选择 **科学**，切换到科学模式界面，执行函数、指数、方根等高级运算。
+3.  选择 **程序员**，切换到程序员模式界面，执行二进制、八进制、十进制、十六进制等复杂运算。
 
 #### 参与贡献