diff --git a/qaly.py b/qaly.py
new file mode 100644
index 0000000..fb8f810
--- /dev/null
+++ b/qaly.py
@@ -0,0 +1,10 @@
+import sys
+
+n = int(sys.stdin.readline())
+qaly = 0.0
+
+for _ in range(n):
+    q, y = sys.stdin.readline().split(' ')
+    qaly += float(q) * float(y)
+
+print(qaly)