diff --git a/chapter2/mysite/myapp/templates/myapp/crawl.html b/chapter2/mysite/myapp/templates/myapp/crawl.html
index afeeaa8..07d28c0 100644
--- a/chapter2/mysite/myapp/templates/myapp/crawl.html
+++ b/chapter2/mysite/myapp/templates/myapp/crawl.html
@@ -119,8 +119,8 @@
                     <li>
                      <span class="leftTitle">内存占用</span>
                      <div class="rightPercent">
-                      <span>{{platform_info.mem_total}}</span>
-                      <p style="width:{% present platform_info.mem_used platform_info.mem_total %}%">{{platform_info.mem_used}}</p >
+                      <span>{{platform_info.mem_total|to_g}}</span>
+                      <p style="width:{% present platform_info.mem_used platform_info.mem_total %}%">{{platform_info.mem_used|to_g}}</p >
                      </div>
                     </li>
                     <li>
diff --git a/chapter2/mysite/myapp/templatetags/myapp.py b/chapter2/mysite/myapp/templatetags/myapp.py
index eed2b7c..6e961a3 100644
--- a/chapter2/mysite/myapp/templatetags/myapp.py
+++ b/chapter2/mysite/myapp/templatetags/myapp.py
@@ -6,4 +6,10 @@ register = template.Library()
 @register.simple_tag
 def present(val1, val2):
     """获取两个数的百分比，取整 val1 / val2 """
-    return int(int(val1) * 100 / int(val2))
\ No newline at end of file
+    return int(int(val1) * 100 / int(val2))
+
+
+@register.filter
+def to_g(val):
+    """字节到G"""
+    return int(int(val)/1024/1024)
\ No newline at end of file