--- /n/sources/plan9/sys/src/cmd/dd.c	Wed Sep 18 21:17:37 2013
+++ /sys/src/cmd/dd.c	Sat Feb 13 22:27:25 2021
@@ -368,6 +368,10 @@
 	for(;;)
 	switch(*cs++) {
 
+	case 'm':
+		n *= 1024*1024;
+		continue;
+
 	case 'k':
 		n *= 1024;
 		continue;