Unfortunately your knowledge of English is worse than your knowledge of maths so your question is difficult to decipher. Please reword it or get someone to help you reword it.
One hopper ton is equal to approximately 0.907 metric tons.
1 ton usually equals to 1000 kilograms.
1 tonne is 1,000kg
1000 kg = 1 ton
1 t(US) = 907.184 kg
907 kilos (US) 1,020 kilos (UK)
Knowing that 1 cubic foot is pretty much equal to 100 pounds or 0.05 ton, 1 ton of gravel is around 20 cubic feet.
1 US (short) ton = 2000 lb 1 UK (long) ton = 2240 lb 1 tonne (metric) = 2204.6 lb
1 metric tonne = 1000 kg
1 ton = 2000 pounds 6.5 tons = 13000 pounds
1 t(US) = 907.184 kg
Chicken.