BIG REQUEST!!!!!

Can you pleeeeeease add a calculator to the trading platform.

It is such a simple necessity, when buying or selling you put in shares and the price and it tells you the total. So Simple.

I don't want to have to click 'Place Buy Order' to see the total first. Then have to cancel and go back and do it again.

Pleeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeease!

Please.

Thanks