A cow weighs 500 kg, and a hippopotamus weighs 6 times that of a cow. How many tons does the hippopotamus weigh?
一头奶牛重500千克，一头河马的体重是奶牛的6倍，河马重多少吨．
<gadget id="calculator">6 / 1_000</gadget>
<output>3/500 = around 0.006</output>

<gadget id="calculator">500 * (3/500)</gadget>
<output>3</output>

<result>3</result>