diff --git a/src/main/java/Calculator.java b/src/main/java/Calculator.java
new file mode 100644
index 00000000..9e04bcf2
--- /dev/null
+++ b/src/main/java/Calculator.java
@@ -0,0 +1,20 @@
+public class Calculator {
+    public Integer add(int x, int y) {
+        return x + y;
+    }
+
+    public Integer subtract(int x, int y) {
+        return x - y;
+    }
+
+    public Integer multiply(int x, int y) {
+        return x * y;
+    }
+
+    public double divide(int x, int y) {
+        if(y == 0) {
+            throw new ArithmeticException("Zero is not divided");
+        }
+        return (double) x / y;
+    }
+}