How to write 10^12

How do I write
while writing problem in codechef
When I write 10^12 It shows 10^1 and then 2 separately instead of 10^12

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Not sure how to do this even for one digit, but try just repeating the operation.
Like, instead of 10a12 where a is power, try 10a1a2

This might help: what is Latex Feature

$10^{12}$ = 10^{12}