fix: Fix tuple multiplication (#177)

Author: GuyKh

custom_components/iec/coordinator.py

@@ -725,9 +725,9 @@ def _calculate_estimated_bill(meter_id, future_consumptions: dict[str, FutureCon
             total_days = today.day
             days_in_current_month = calendar.monthrange(today.year, today.month)[1]
 
-            consumption_price = future_consumption * kwh_tariff, 2
-            total_kva_price = kva_price * total_days, 2
-            distribution_price = (distribution_tariff / days_in_current_month) * total_days, 2
+            consumption_price = round(future_consumption * kwh_tariff, 2)
+            total_kva_price = round(kva_price * total_days, 2)
+            distribution_price = round((distribution_tariff / days_in_current_month) * total_days, 2)
             delivery_price = (delivery_tariff / days_in_current_month) * total_days
 
         _LOGGER.debug(f'Calculated estimated bill: No. of days: {total_days}, total KVA price: {total_kva_price}, '