Fix compare_weapon calculation.

diff --git a/src/bldg.c b/src/bldg.c
index 5949959..9933af6 100644 (file)
--- a/src/bldg.c
+++ b/src/bldg.c
@@ -3171,8 +3171,8 @@ static s16b calc_slaydam(int dam, int mult, int div, bool force)
        if(force)
        {
                tmp = dam * 60;
-               tmp *= mult * 3 / 2;
-               tmp /= div;
+               tmp *= mult * 3;
+               tmp /= div * 2;
                tmp += dam * 60 * 2;
                tmp /= 60;
        }