[css-values] More stupid math errors. Thanks go to Murakami-san...

Author: fantasai

css-values/Overview.bs

@@ -664,7 +664,7 @@ Absolute lengths: the ''cm'', ''mm'', ''q'', ''in'', ''pt'', ''pc'', ''px'' unit
 	<tbody>
 		<tr><th><dfn>cm</dfn>
 		    <td>centimeters
-		    <td>1cm = 243.84px
+		    <td>1cm = 96px/2.54
 		<tr><th><dfn>mm</dfn>
 		    <td>millimeters
 		    <td>1mm = 1/10th of 1cm

css-values/Overview.html

@@ -801,7 +801,7 @@ <h3 class="heading settled heading" data-level=5.2 id=absolute-lengths><span cla
 	<tbody>
 		<tr><th><dfn data-dfn-type=dfn data-export="" id=cm>cm<a class=self-link href=#cm></a></dfn>
 		    <td>centimeters
-		    <td>1cm = 243.84px
+		    <td>1cm = 96px/2.54
 		<tr><th><dfn data-dfn-type=dfn data-export="" id=mm>mm<a class=self-link href=#mm></a></dfn>
 		    <td>millimeters
 		    <td>1mm = 1/10th of 1cm