multiplication and division method and tests

src/test/java/CalculatorResourceTest.java

@@ -37,4 +37,21 @@ public class CalculatorResourceTest{
         expression = "20-2";
         assertEquals(18, calculatorResource.subtraction(expression));
     }
+
+    @Test
+    public void testMultiplication(){
+        CalculatorResource calculatorResource = new CalculatorResource();
+
+        String equation = "5*5";
+        assertEquals(25, calculatorResource.multiplication(equation));
+    }
+
+    @Test
+    public void testMultiplication(){
+        CalculatorResource calculatorResource = new CalculatorResource();
+
+        String equation = "16/4";
+        assertEquals(4, calculatorResource.division(equation));
+    }
+
 }