diff --git a/calculator/B1-M4-calculator.py b/calculator/B1-M4-calculator.py
new file mode 100644
index 0000000..9802e6b
--- /dev/null
+++ b/calculator/B1-M4-calculator.py
@@ -0,0 +1,67 @@
+import math
+title="Calculator"
+print("-----------------------------------------------------------------------------------------------------------")
+print(title.center(100))
+print("-----------------------------------------------------------------------------------------------------------")
+print("Select your option:")
+le=[]
+result_dict={}
+count=1
+result=0
+while(1):
+	print("1:Addition\t","2:Subtraction\t","3:Multiplication\t","4:Division\t","5:sin\t","6:cos\t","7:tan")
+	choice=input("Enter your choice: ")
+
+	if choice=='1':
+		num1=float(input('Enter 1st number: '))
+		num2=float(input('Enter 2nd number: '))
+		result=num1+num2
+		string=str(num1)+'+'+str(num2)
+	elif choice=='2':
+		num1=float(input('Enter 1st number: '))
+		num2=float(input('Enter 2nd number: '))
+		result=num1-num2
+		string=str(num1)+'-'+str(num2)
+	elif choice=='3':
+		num1=float(input('Enter 1st number: '))
+		num2=float(input('Enter 2nd number: '))
+		result=num1*num2
+		string=str(num1)+'*'+str(num2)
+	elif choice=='4':
+		try:
+			num1=float(input('Enter 1st number: '))
+			num2=float(input('Enter 2nd number: '))
+			result=num1/num2
+		except:
+			result="Error: Dividing by zero!"
+		string=str(num1)+'/'+str(num2)
+	elif choice=='5':
+		x=int(input("Enter the angle: "))
+		y=math.radians(x)
+		result=math.sin(y)
+		string='sin '+str(y)
+	elif choice=='6':
+		x=int(input("Enter the angle: "))
+		y=math.radians(x)
+		result=math.cos(y)
+		string='cos '+str(y)
+	elif choice=='7':
+		x=int(input("Enter the angle: "))
+		y=math.radians(x)
+		result=math.tan(y)
+		string='tan '+str(y)
+	else:
+		print("Invalid choice!")
+	le.append(string)
+	result_dict[count]=result
+	count=count+1
+	print(string,"=",result)
+	choice1=input("Do you want to perform any other operation: 1:Yes \t2:No\n")
+	
+	if choice1!='1':
+		break
+	print("-----------------------------------------------------------------------------------------------------------")
+	print("Result history".center(100))
+	for i in range (len(le)):
+		print(le[0],'\t',result_dict[i+1])
+	print("-----------------------------------------------------------------------------------------------------------")