The mass of Venus is about 4.871 times 10^21 metric tons.

Question

The mass of the sun is about 1.998 times 10^27 metric tons. how many times the mass of venus is the mass of the sun? Give the answer in scientific notation.

Answer 1

mass(Sun) / mass(Venus) = 1.998 e+27 /  4.871 e+21

= 4.102e+5 Venus in the Sun.

Note: 1.998 e+27, these are tons.

Answer 2

Although they aren't dramatically different to your figures, according to NASA's Planetary Fact Sheets, the mass of the Sun is 1.9891 x 10^30 Kg and Venus is 4.8685 x 10^24 Kg

So 1.9891 x 10^30 / 4.8685 x 10^24 = 408,565.267

or 4.085 652 67 x 10^5 if you prefer