To find 7-digit numbers, we use the steps mentioned earlier in the topic.
Largest 7-digit number: 9999999
Smallest 7-digit number: 1000000
Therefore, the total number of 7-digit numbers are:
\begin{aligned}
&=9999999-1000000\\
&=8999999+1\\
&=9000000
\end{aligned}
There are a total of Ninety Lakh numbers with 7 digits.
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