diff --git a/cmd/gcd.go b/cmd/gcd.go
index e49211e..48e875f 100644
--- a/cmd/gcd.go
+++ b/cmd/gcd.go
@@ -27,10 +27,10 @@ import (
 var extended bool
 
 func gcd(cmd *cobra.Command, args []string) {
-	var x big.Int
-	var y big.Int
-	var z big.Int
-	var w big.Int
+	x := new(big.Int)
+	y := new(big.Int)
+	z := new(big.Int)
+	w := new(big.Int)
 
 	bezouts := make([]big.Int, len(args))
 
@@ -40,7 +40,7 @@ func gcd(cmd *cobra.Command, args []string) {
 			log.Fatal("invalid input " + s)
 		}
 
-		z.GCD(&x, &y, &z, &w)
+		z.GCD(x, y, z, w)
 
 		if !extended {
 			continue
@@ -48,15 +48,15 @@ func gcd(cmd *cobra.Command, args []string) {
 
 		for j, c := range bezouts {
 			if j == i {
-				bezouts[j].Set(&y)
+				bezouts[j].Set(y)
 			} else {
-				bezouts[j].Mul(&c, &x)
+				bezouts[j].Mul(&c, x)
 			}
 
 		}
 	}
 
-	fmt.Print(&z)
+	fmt.Print(z)
 	if extended {
 		for _, c := range bezouts {
 			fmt.Printf(" %s", &c)