fix: rate auto changing from 3.9 to 39 (#8560)

* fix: rate auto changing from 3.9 to 39

* fix: codacy

frappe/public/js/frappe/form/controls/currency.js

@@ -1,12 +1,23 @@
 frappe.ui.form.ControlCurrency = frappe.ui.form.ControlFloat.extend({
 	eval_expression: function(value) {
 		if (typeof value === 'string' 
-			&& value.match(/^[0-9+-/* ]+$/)
-			// paresFloat('1,44,000') returns 1.0
-			// 1,44,000 are being passed when we paste rows from excel sheet to a table
-			&& value.includes(',')) {
-			return value.replace(",", "");
+			&& value.match(/^[0-9+-/* ]+$/)) {
+			if (value.includes(',')) {
+				// paresFloat('1,44,000') returns 1.0
+				// 1,44,000 are being passed when we paste rows from excel sheet to a table)
+
+				const regex = new RegExp("\\,", "g");
+				value = value.replace(regex, "");
+			}
+
+			try {
+				return eval(value);
+			} catch (e) {
+				return value;
+			}
 		}
+
+		// If not string
 		return value;
 	},