Probability question?

[Buz]

[ QUOTE ]
What's the risk of ruin?

[/ QUOTE ]
If your risk of losing one spin is 7/37, then your risk of losing two in a row is 7/37 of 7/37. In other words, you will lose two in a row 7/37ths of the times you lose one. Consequently, you will only lose 7 in a row 7/37 X 7/37 seven times... or (7/37)^7. I got, like, 8.6 in a million or 1 in 115,000. Any math professors agree?

It looks like it is less risky than say, trying to double up blackjak losses.