1 files changed, 3 insertions, 0 deletions
diff --git a/src/com/android/calculator2/BoundedRational.java b/src/com/android/calculator2/BoundedRational.java
index 9d3e2a7..dc132f6 100644
--- a/src/com/android/calculator2/BoundedRational.java
+++ b/src/com/android/calculator2/BoundedRational.java
@@ -555,6 +555,9 @@ public class BoundedRational {
             }
             return prod1.multiply(prod2);
         } else {
+            if (n == 0) {
+                return BigInteger.ONE;
+            }
             BigInteger res = BigInteger.valueOf(n);
             for (long i = n - step; i > 1; i -= step) {
                 res = res.multiply(BigInteger.valueOf(i));