tools/android/loading Fix precision and formatting issues in frontend

tools/android/loading/cloud/frontend/clovis_frontend.py

Index: tools/android/loading/cloud/frontend/clovis_frontend.py
diff --git a/tools/android/loading/cloud/frontend/clovis_frontend.py b/tools/android/loading/cloud/frontend/clovis_frontend.py
index ecb19eee46d86dffb43c7864f1eaac4a38216ca4..99a2257ee1a493904bc4244a52c5d740dd47b1e6 100644
--- a/tools/android/loading/cloud/frontend/clovis_frontend.py
+++ b/tools/android/loading/cloud/frontend/clovis_frontend.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import logging
+import math
 import os
 import sys
 import time
@@ -358,8 +359,8 @@ def StartFromJsonString(http_body_str):
   # Compute the number of required instances if not specified.
   if not task.BackendParams().get('instance_count'):
     target_parallel_duration_s = 1800.0 # 30 minutes.
-    task.BackendParams()['instance_count'] = int(
-        sequential_duration_s / target_parallel_duration_s + 0.5)  # Rounded up.
+    task.BackendParams()['instance_count'] = math.ceil(
+        sequential_duration_s / target_parallel_duration_s)
 
   # Check the instance quotas.
   clovis_logger.info(
@@ -382,7 +383,7 @@ def StartFromJsonString(http_body_str):
     # Timeout is at least 1 hour.
     task.BackendParams()['timeout_hours'] = max(1, 5 * expected_duration_h)
   clovis_logger.info(
-      'Timeout delay: %i hours. ' % task.BackendParams()['timeout_hours'])
+      'Timeout delay: %.1f hours. ' % task.BackendParams()['timeout_hours'])
 
   if not EnqueueTasks(sub_tasks, task_tag):
     return Render('Task creation failed.', memory_logs)