https://www.wolfram.com/language/12/core-language/numbers-in-decimal-form.html.en?footer=lang
Numbers in Decimal Form: New in Wolfram Language 12
decimal formwolfram languagenumbersnew12
https://www.wolframalpha.com/input?i=decimal%20form%20of%207*23_7%5E2
decimal form of 7*23_7^2 - Wolfram|Alpha
decimal formof 723 2wolframalpha