How many kilograms are in 4.5 tons?
1 ton is equivalent to 1000 kilograms, so 4.5 tons is equivalent to 4.5 * 1000 kg = 4500 kilograms.
Complete the following task based on the instruction and optional input provided.### Instruction:
How many kilograms are in 4.5 tons?

### Output:
1 ton is equivalent to 1000 kilograms, so 4.5 tons is equivalent to 4.5 * 1000 kg = 4500 kilograms.