A lot; 398.10717055349725077025230508775 x 10^1038 to be exact, or about 400 followed by another 10100000000,0000000000,0000000000,0000000000 zeroes.
3 times 10 to the 8th power divided by 7 times 10 to the negative 7th power equates to: 4.28571428571
3.45 x 10^1
1.39 times 10 to the 2nd power is 139
2000 times larger
6.3333333 x 10^20
1 with 26 0's 1,000,000,000,000,000,000,000,000,000
10 to the 26th power is written as "10,000,000,000,000,000,000,000,000,000" in standard form. This means that you multiply 10 by itself 26 times, resulting in a number with 27 digits. This number is also known as a "septillion" in the short scale naming system.
It's a very large number. Without scientific notation, it's 862,300,000,000,000,000,000,000,000 .
10 to the 4 power times 10 to the 3 power is 10,000,000 (10 million).
1
3 times 10 to the 8th power divided by 7 times 10 to the negative 7th power equates to: 4.28571428571
3.45 x 10^1
3 times 10 to the first power = 30
1.39 times 10 to the 2nd power is 139
1.35 times 10 to the 19th power = 13,500,000,000,000,000,000
2 times 10 to the 3rd power = 2,000
4.03 times 10 to the power of 8 = 403,000,000