It is in two parts.

First I need to get the period of a wave with a frequency of 475Hz and then round it to 3 significant figures

It occurred to me:

1/475 * 103 = 2.11

Then, I need to reduce the value of time by a factor of 5 and then get the frequency.

I finished with

5 / 2.11 * 10 ^ 3 = 2.37KHz

Now, what's wrong with me is that it should be "2.11 / 5", but it's the other way around.

This gives me a different answer.

2.11 / 5 * 10 ^ 3 = 0.42KHz

The problem now is that, according to an online calculator, the first response of 2.37KHz is correct and 0.42KHz is incorrect.

Please help? Is the division supposed to be the other way around? Is this just a feature of this particular brand of math?