diff -ur kdebase-3.5.10/kdesktop/minicli.cpp kdebase-3.5.10-minicli-decimal-comma/kdesktop/minicli.cpp
--- kdebase-3.5.10/kdesktop/minicli.cpp	2007-01-15 12:32:10.000000000 +0100
+++ kdebase-3.5.10-minicli-decimal-comma/kdesktop/minicli.cpp	2008-10-08 11:49:33.000000000 +0200
@@ -857,9 +857,12 @@
   updateAuthLabel();
 }
 
-QString Minicli::calculate(const QString &exp)
+QString Minicli::calculate(const QString &input)
 {
    QString result, cmd;
+   QString exp = input;
+   //replace commas with dots so european decimals can be calculated
+   exp.replace(QChar(','), ".");
    const QString bc = KStandardDirs::findExe("bc");
    if ( !bc.isEmpty() )
       cmd = QString("echo %1 | %2").arg(KProcess::quote(QString("scale=8; ")+exp), KProcess::quote(bc));