diff --git a/src/utils.cpp b/src/utils.cpp
index 713925b..246ca1d 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -225,6 +225,13 @@ std::any Mul(std::any a, std::any b) {
       ptr_a_string = std::any_cast<std::string>(&a);
       ptr_b_string = std::any_cast<std::string>(&b);
     }
+    if (Less(b, ZYM::int2048(0))) {
+      b = Neg(b);
+      ptr_b_bool = std::any_cast<bool>(&b);
+      ptr_b_int2048 = std::any_cast<ZYM::int2048>(&b);
+      ptr_b_float = std::any_cast<double>(&b);
+      ptr_b_string = std::any_cast<std::string>(&b);
+    }
     if (ptr_b_float != nullptr) {
       b = Any2Int(*ptr_b_float);
       ptr_b_int2048 = std::any_cast<ZYM::int2048>(&b);
@@ -279,6 +286,8 @@ std::any Div(std::any a, std::any b) {
 std::any Divv(std::any a, std::any b) {
   if (std::any_cast<NoneType>(&a)) a = (bool)false;
   if (std::any_cast<NoneType>(&b)) b = (bool)false;
+  if (std::any_cast<std::string>(&a) != nullptr) a = ZYM::int2048(0);
+  if (std::any_cast<std::string>(&b) != nullptr) b = ZYM::int2048(0);
   ConverToSameArithType(a, b);
   bool *ptr_a_bool = std::any_cast<bool>(&a);
   bool *ptr_b_bool = std::any_cast<bool>(&b);