Yes, I already calculated that. For 10 db more SPL, you need 10x power.That's completely wrong. All we know from that is that the Mojo has 750x the power that can drive the Stealth to at least 83 dB at 1 kHz. Power requirements go up exponentially for increasing SPL. Should be more than enough though. I believe Dan Clark recommended an amplifier that can provide at least 400 mW.
So 1 mW drives Stealth up to 83 dB by definition
10 mW drives it up to 93 dB
100 mW drives it up to 103 dB
1000 mW drives it up to 113 dB
Mojo can output 750 mW, which can drive Stealth up to approximately 111 dB
It is weird that you called my math "completely wrong" without any context.