diff --git a/.travis.yml b/.travis.yml
index 9d7b120..ca061a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,4 +15,4 @@ before_script:
   - composer self-update
   - composer install --dev
 
-script: phpunit
+script: phpunit
\ No newline at end of file
diff --git a/src/GCD.php b/src/GCD.php
index e8e9d9e..b050ed5 100644
--- a/src/GCD.php
+++ b/src/GCD.php
@@ -28,7 +28,7 @@ public static function getGCD($numberA, $numberB)
         }
 
         if (function_exists("gmp_gcd")) {
-            return gmp_gcd($numberA, $numberB);
+            return gmp_intval(gmp_gcd($numberA, $numberB));
         }
 
         if ($numberA == 0 || $numberB == 0) {
diff --git a/src/Number.php b/src/Number.php
index 0f277fe..12cc551 100644
--- a/src/Number.php
+++ b/src/Number.php
@@ -81,7 +81,7 @@ protected function computeDividend($askedDividend, $askedDivisor, Number $number
 
     protected function simplify()
     {
-        if (1 < $gcd = (int) GCD::getGCD($this->dividend, $this->divisor)) {
+        if (1 < $gcd = GCD::getGCD($this->dividend, $this->divisor)) {
             $this->dividend /= $gcd;
             $this->divisor /= $gcd;
         }
diff --git a/tests/Lovenunu/Math/NumberTest.php b/tests/Lovenunu/Math/NumberTest.php
index d19e365..e3a357a 100644
--- a/tests/Lovenunu/Math/NumberTest.php
+++ b/tests/Lovenunu/Math/NumberTest.php
@@ -18,6 +18,14 @@
  */
 class NumberTest extends PHPUnit_Framework_TestCase
 {
+    public function testMult()
+    {
+        $numberA = new Number('1');
+        $numberB = $numberA->multiply('1.2393');
+
+        $this->assertEquals(1.2393, $numberB->getNumber(-1));
+    }
+
     public function testNumberAdd()
     {
         $numberA = new Number('1.99');