Three hundred seven.
CCCVII
921 = 3 x 307
3.07 x 10^2
3.07 = 307/100
3.07 = 37/100 which cannot be simplified further.
The positive integer factors of 307 are: 1, 307
307 is a prime. It is divisible only by 1 and 307.
This is 305:|And this is 307:|
4321
1 and 307
307 is prime.
307 + 288 = 595