In order to decorate the venue for the school's sports meeting, the fifth grade bought 700 balloons, and the fourth grade bought twice as many balloons as the fifth grade. How many did the fourth grade buy?
学校开运动会为了布置会场，五年级买了700个气球，四年级是五年级买的气球的2倍，四年级买了多少个？
<gadget id="calculator">700 * 2</gadget>
<output>1_400</output>

<result>1_400</result>