MATHS QUESTION (place value)

I can’t get a question right for my math assessment.
(something has to do with place value?) It’s this:
You’re given the information that 31 x 156 = 4836. Use this to work out the following and show your working out:
310 x 156 =
4,836 x 1560 =
3.1 x 15,600 =
48,360 x 3100 =

If you want help with this, you really need to post your working and answers.

I don't know the answer, which is why I posted this here.
Thank you, I have edited the mistake, two of them are multiplications and the other two are divisions.