feat(decimal) : Add decimal support for calculations.

Signed-off-by: TusharFA <tushar@flick2know.com>

lib/src/utils/number_system_utils.dart

@@ -1,3 +1,4 @@
+import 'package:decimal/decimal.dart';
 import 'package:fa_dart_core/fa_dart_core.dart';
 
 class NumberSystemUtils {
@@ -37,4 +38,27 @@ class NumberSystemUtils {
       isCompact: isCompact,
     );
   }
+
+  /// Dart doesn't support operator overloading for now.
+
+  num decimalPlus(num first, num second) => num.parse(
+      (Decimal.parse(first.toString()) + Decimal.parse(second.toString()))
+          .toString());
+
+  num decimalSubtract(num first, num second) => num.parse(
+      (Decimal.parse(first.toString()) - Decimal.parse(second.toString()))
+          .toString());
+
+  num decimalMultiply(num first, num second) => num.parse(
+      (Decimal.parse(first.toString()) * Decimal.parse(second.toString()))
+          .toString());
+
+  num decimalDivide(num first, num second) {
+    if (second == 0 || second == 1) {
+      return first;
+    }
+    return num.parse(
+        (Decimal.parse(first.toString()) / Decimal.parse(second.toString()))
+            .toString());
+  }
 }

pubspec.lock

@@ -89,6 +89,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.3"
+  decimal:
+    dependency: "direct main"
+    description:
+      name: decimal
+      sha256: "4140a688f9e443e2f4de3a1162387bf25e1ac6d51e24c9da263f245210f41440"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
   fa_dart_logger:
     dependency: "direct main"
     description:
@@ -242,6 +250,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  rational:
+    dependency: transitive
+    description:
+      name: rational
+      sha256: cb808fb6f1a839e6fc5f7d8cb3b0a10e1db48b3be102de73938c627f0b636336
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.3"
   rxdart:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -13,6 +13,7 @@ environment:
 dependencies:
   rxdart: ^0.27.7
   intl: ^0.19.0
+  decimal: ^3.0.2
 
   # Logger
   fa_dart_logger: