We use 0 as a place holder
The number has 7 digits which means it will start with ten lakh.
A number with 10 lakhs place must have 7 digit in it.
Think of a place value chart
Put the number in the place value chart
A number with 10 lakhs place must have 7 digit in it.
The number has 7 digits which means it will start with ten lakh.