diff --git a/webapp/services/BlockChainService.php b/webapp/services/BlockChainService.php
index 854cda25..a442715a 100644
--- a/webapp/services/BlockChainService.php
+++ b/webapp/services/BlockChainService.php
@@ -90,7 +90,7 @@ class BlockChainService {
     {
         $xiShu = 10000;
         $intPrice = $price * $xiShu;
-        $formatedStr = phpcommon\bnDiv(phpcommon\bnMul_s($intPrice, phpcommon\bnPow_s(10, 18)), $xiShu);
+        $formatedStr = phpcommon\bnDiv_s(phpcommon\bnMul_s($intPrice, phpcommon\bnPow_s(10, 18)), $xiShu);
         return $formatedStr;
     }