cow and a horse together weigh 1 ton and 500 kilograms, a cow and an elephant weigh 4 tons and 500 kilograms, and an elephant and a horse weigh 4 tons. The cow, the horse, and the elephant weigh together how many tons they weigh together.
一头牛和一匹马在一起称体重是1吨500千克，这头牛和一只大象在一起称体重是4吨500千克，这头大象和这匹马在一起称体重是4吨．这头牛、这匹马还有这只大象在一起称体重共重多少吨．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>