One example is 1 + 899.
899
900
It is: 899+1 = 900
1-900 = -899
900
To get the next number after any number, just add 1.
There are 900 centimeters in 9 meters, as 1 meter is equal to 100 centimeters.
The number is still 899, but it has been rounded to 1,000 .
30 x 30 = 900
It is: 30*30 = 900
900 times 76 times 6 is equal to 410,400.