From 3021dd1d7d17b40e4ed56922f3de7c27335ed804 Mon Sep 17 00:00:00 2001
From: Ujjwal Ojha <bring2uo@gmail.com>
Date: Mon, 28 Apr 2014 17:47:33 +0545
Subject: [PATCH] Used BC Math Functions

---
 src/Crisu83/Conversion/Quantity/Quantity.php | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/Crisu83/Conversion/Quantity/Quantity.php b/src/Crisu83/Conversion/Quantity/Quantity.php
index 63fb4f2..a18ba99 100644
--- a/src/Crisu83/Conversion/Quantity/Quantity.php
+++ b/src/Crisu83/Conversion/Quantity/Quantity.php
@@ -64,7 +64,7 @@ public function add($quantity, $unit = null)
         $quantity = new static($quantity, $unit);
         /** @var Quantity $quantity */
         $quantity->to($this->unit);
-        $this->value += $quantity->getValue();
+        $this->value = bcadd($this->value, $quantity->getValue());
         return $this;
     }
 
@@ -83,7 +83,7 @@ public function sub($quantity, $unit = null)
         $quantity = new static($quantity, $unit);
         /** @var Quantity $quantity */
         $quantity->to($this->unit);
-        $this->value -= $quantity->getValue();
+        $this->value = bcsub($this->value, $quantity->getValue());
         return $this;
     }
 
@@ -108,7 +108,7 @@ public function to($unit)
      */
     protected function convert($from, $to, $value)
     {
-        return ($value * $this->getConversionRate($from)) / $this->getConversionRate($to);
+        return bcdiv(bcmul($value, $this->getConversionRate($from)), $this->getConversionRate($to));
     }
 
     /**