A model of a warship is placed in a pool. The edge of the warship is 80 centimeters above the water surface. Water is continuously poured into the pool, and the water level will rise by 20 centimeters per hour. How many hours will this warship sink?
一艘军舰模型摆放在水池中，军舰的船沿高出水面80厘米，现向池中不断注水，每小时水面会上涨20厘米．问几小时后这艘军舰会沉没？
<gadget id="calculator">80 / 20</gadget>
<output>4</output>

<result>4</result>