You can also check on the Multiply BTC page. For every roll that is listed there is an arrow you can click on and it will give you more detailed information. It will tell you how many lottery tickets or RP you had prior to spinning the wheel and how many you have after you have claimed your spin.

yessss I finally have 0.01% chance to win the Lambo thing. I've been working towards this so much, I have only bought 3 tickets I think, the rest was earned by playing Multiply.