The polar bear is a symbol of the North Pole. Polar bears, also called white bears, are the largest species of bears. The polar bear has a huge body, with a body length of more than 2.7 meters and a shoulder height of 1.6 meters when walking. The largest polar bear can weigh up to 900 kilograms, which is 200 kilograms heavier than brown bears. It is as fast as a horse when running. How many kilograms can a brown bear weigh?
北极熊是北极的象征．北极熊也叫白熊，是熊类中个体最大的一种．北极熊身躯庞大，体长可达2.7米以上，行走时肩高为1.6米，最大的北极熊体重可达900千克，比棕熊重200千克．奔跑时最快可以和骏马媲美．棕熊体重可达多少千克？
<gadget id="calculator">900 - 200</gadget>
<output>700</output>

<result>700</result>