diff --git a/performance/napkin-math/problems/1_logging_cost.md b/performance/napkin-math/problems/1_logging_cost.md
index 19cfa06..1b7f294 100644
--- a/performance/napkin-math/problems/1_logging_cost.md
+++ b/performance/napkin-math/problems/1_logging_cost.md
@@ -37,7 +37,7 @@ ______
 86,400 seconds per day.
 
 
-`86,400 * 10^6 RPS ~= 9 * 10^3 * 10^6 ~= 9 * 10^9` requests a day.
+`86,400 * 10^5 RPS ~= 9 * 10^4 * 10^5 ~= 9 * 10^9` requests a day.
 
 **How many log lines per request?:** `10`