When it approximates to ten digits, the divisor obtained by rounding into one is 2070, and the divisor obtained by rounding is 2060;

When it is close to 100 hours, the divisor obtained by rounding into one is 2 100, and the divisor obtained by rounding is 2000;

When it approximates to thousands, the divisor obtained by the method of entering one is 3000, and the divisor obtained by rounding off is 2000.