I would suggest reading the camera's manual. It should have been included when you purchased the camera. If not, you should Google the manual because every digital camera is going to work differently.
Measurements need to be specific so we use significant digits.
The number 202.45 has five significant digits.
To estimate the number of digits in a tetration you have to use the modulus value.
You use it to concentrate you attention on the important digits rather than dealing with details which are less important.
China
1
249 + 318 = 567
There are 9 pages that use a single digit (pages 1-9), leaving 495 digits - 9 pages × 1 digit/page = 486 digits There are 90 pages that use 2 digits (pages 10-99), leaving 486 digits - 90 pages × 2 digits/page = 306 digits There are 900 pages that use 3 digits (pages 100-999); this would be 2,700 digits, so the number of pages is somewhere in the hundreds. 306 digits ÷ 3 digits/page = 102 pages in the hundreds. → total number of pages = 102 + 90 + 9 = 201 pages.
Use a calculator!
To determine the last page number using 822 digits, we can break it down by the number of digits used for each range of page numbers. Pages 1 to 9 use 9 digits (1 digit each), pages 10 to 99 use 180 digits (90 pages × 2 digits), and pages 100 onward use 3 digits each. After using 189 digits for pages 1 to 99, there are 633 digits remaining for pages 100 and beyond, which accounts for 211 pages (633 ÷ 3). Thus, the last page is 99 + 211 = page 310.
As a result of the rule that you use the definition of the term - such as significant digits - when finding them for a number.
Because you need symbols, that occupy only one 'place', for sixteen digits, and we only have ten common numerical digits.