diff --git a/job.go b/job.go
index 5aed523..3d88247 100644
--- a/job.go
+++ b/job.go
@@ -2272,7 +2272,8 @@ func jobShops(j Job) {
 			out = fmt.Sprintf("%s <a href=\"https://t.me/share/url?url=/ws_%s\">%s</a>", out, cwm.Link, cwm.User)
 
 			if cwm.Mana < cwm.ManaTotal {
-				d := time.Duration((cwm.ManaTotal-cwm.Mana)/((cwm.ManaTotal/250)+1)) * time.Minute
+				t := (cwm.ManaTotal - cwm.Mana) / ((cwm.ManaTotal / 250) + 1)
+				d := time.Duration(t) * time.Minute
 				out = fmt.Sprintf("%s %s\n", out, d.String())
 			} else {
 				out = fmt.Sprintf("%s\n", out)