3x1013 is a fairly large number that it is best kept in scientific notation - that makes it easier to read it, and compare to other numbers. If you write it out, you get a 3, followed by 13 zeroes.
30 Trillion
3 x10 30 x10
2.058911321...x10^14
0.00604
x10 to the power of -3 m
5.98kPA
0.000000001
1.357 x10-3 in standard notation is: 0.001357
350000
570,000,000
2.3*107 = 23,000,000
29000000
kg x10^3