On Mystic Island math is done via symbols.
Distinct symbols represent distinct digits, varying from 0 to 9.
From the picture below, figure out the corresponding digits. Please provide your reasoning.
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625 / 25 = 25 - - + 225 / 15 = 15 = = = 400 / 10 = 40
$\square$ is either $0,1,5,6$, it can't be $0$ from line 2, and therefore the sum involves either $21,31,15,25,16,26$, and only $21$ and $15$ fit the pattern. However $\square=1$ implies $\otimes=2$, and this is obviously false.