diff --git a/libs/P_C.py b/libs/P_C.py
index f743e7d..782ba22 100644
--- a/libs/P_C.py
+++ b/libs/P_C.py
@@ -8,16 +8,18 @@ file name stand for : Physics calculation
 import libs
 import math
 
+from libs.tools import F_Mi, F_Mu, F_A, F_D
+
 
 def S_C_float_check(SC):  # stand for Scientific notation's float check
     """
     formats:
     SC list format:docs.basic_config.json:basic_number"""
     while SC[0] >= 10:
-        SC[0] /= 10
+        SC[0] = F_D(SC[0], 10)
         SC[1] += 1
     while SC[0] < 1:
-        SC[0] *= 10
+        SC[0] = F_Mu(SC[0], 10)
         SC[1] -= 1
 
 
@@ -25,7 +27,7 @@ def S_N_M(A, B):  # stand for Scientific notation multiple
     """
     formats:
     A & B list format:docs.basic_config.json:basic_number"""
-    C = [A[0] * B[0], int(A[1] + B[1])]
+    C = [F_Mu(A[0], B[0]), F_A(A[1], B[1])]
     S_C_float_check(C)
     Unit1, Unit2 = A[2] + B[2], A[3] + B[3]
     if Unit1 == None:
@@ -39,7 +41,7 @@ def S_N_D(A, B):  # stand for Scientific notation divided
     """
     formats:
     A & B list format:docs.basic_config.json:basic_number"""
-    C = [float(A[0] / B[0]), int(A[1] - B[1])]
+    C = [F_D(A[0], B[0]), F_Mi(A[1], B[1])]
     S_C_float_check(C)
     Unit1, Unit2 = A[2] + B[3], A[3] + B[2]
     if Unit1 == None:
diff --git a/libs/__init__.py b/libs/__init__.py
index b39f7fc..c976dad 100644
--- a/libs/__init__.py
+++ b/libs/__init__.py
@@ -6,7 +6,7 @@ mail: 3695888@qq.com
 import libs.Game_threads
 
 # import in this forder
-import libs.S_D
+import libs.P_C
 import libs.main
 import libs.tools
 import libs.loads
diff --git a/libs/tools.py b/libs/tools.py
index 5847470..b914228 100644
--- a/libs/tools.py
+++ b/libs/tools.py
@@ -35,16 +35,24 @@ def D_C(listA, listB):  # stand for Duplicate check
 
 
 def F_Mu(A, B):  # stand for float multiple
-    pass
+    a = decimal.Decimal(str(A))
+    b = decimal.Decimal(str(B))
+    return float(a * b)
 
 
 def F_D(A, B):  # stand for float divided
-    pass
+    a = decimal.Decimal(str(A))
+    b = decimal.Decimal(str(B))
+    return float(a / b)
 
 
-def F_P(A, B):  # stand for float plus
-    pass
+def F_A(A, B):  # stand for float plus
+    a = decimal.Decimal(str(A))
+    b = decimal.Decimal(str(B))
+    return float(a + b)
 
 
 def F_Mi(A, B):  # stand for float minus
-    pass
+    a = decimal.Decimal(str(A))
+    b = decimal.Decimal(str(B))
+    return float(a - b)
diff --git a/test.py b/test.py
index a7d5477..e860ed7 100644
--- a/test.py
+++ b/test.py
@@ -12,9 +12,9 @@ B = [2.45, -7, ["N", "kg"], ["m", "s"]]
 print("A = " , A)
 print("B = " , B)
 
-C = libs.S_D.S_N_M(A, B)
-D = libs.S_D.S_N_D(A, B)
-E = libs.S_D.S_N_D(C, B)
+C = libs.P_C.S_N_M(A, B)
+D = libs.P_C.S_N_D(A, B)
+E = libs.P_C.S_N_D(C, B)
 
 print("A × B = " , C)
 print("A ÷ B = " , D)