Is the mark scheme wrong? AS chemistry. HELP

[OhGosh]

Asks us to Calculate the concentration of Fe2+ in ________, in mol dm–3, [ans:0.354]
and the previous question Calculate how many moles of Fe2+ [ans:1.77]
so for the concentration wudn't u do moles/volume?
Oh volume being 25cm3

So for mole: 1.77/(25/1000)
marks scheme has 1.77*(1000/25)
i don't get it?? why do u have to multiply by the moles and divide by 25? I thought it was /1000 to get dm3

 

[mathmaster]

u get the same answer.ms isnt wrong.its simple math.its wrong mathematically to write one division below the other,so u multiply the mole and when you do so you have to flip the volume upsidedown..just a math rule.
1.77/(25/1000)=0

1.77=(25/1000)

1.77*1000/25=0
hope tht helped