Format cache size and display on info

src/restore.ts

@@ -72,7 +72,11 @@ async function run() {
             await cacheHttpClient.downloadCache(cacheEntry, archivePath);
 
             const archiveFileSize = utils.getArchiveFileSize(archivePath);
-            core.debug(`File Size: ${archiveFileSize}`);
+            core.info(
+                `Cache Size: ~${Math.round(
+                    archiveFileSize / (1024 * 1024)
+                )} MB (${archiveFileSize} B)`
+            );
 
             io.mkdirP(cachePath);
 

src/save.ts

@@ -59,7 +59,9 @@ async function run() {
         core.debug(`File Size: ${archiveFileSize}`);
         if (archiveFileSize > fileSizeLimit) {
             core.warning(
-                `Cache size of ${archiveFileSize} bytes is over the 400MB limit, not saving cache.`
+                `Cache size of ~${Math.round(
+                    archiveFileSize / (1024 * 1024)
+                )} MB (${archiveFileSize} B) is over the 400MB limit, not saving cache.`
             );
             return;
         }