5 metres long, 4 metrs wide and 3 metres high. What is the volume in cubic decimetres?

It sounds like a math homework question to me.

50 Billion messimeters or maybe 150 billion messimeters.

I decimetre = 10 centimetres. So, is my maths doesn't fail me, 5m X 4m X 3m = 50dm X 40dm X 30dm or 60,000 cubic decimetres.

This is such an elementary question it is ridiculous. If you are an adult, you need remedial math. It you are a student, if this is in your current assignment, you should have paid attention in class and/or read your text.In both cases, you may as well give it up and become a day laborer.

I am flagging this question as low quality.

Nick B is correct the answer is 60,000 cubic decimetres.