In order to participate in the speech contest, Xiaofang prepared a speech of about 900 words and the speech time is 5 minutes. If she wants to make a speech of 10 minutes, how many words of speech should she prepare?
小芳为了参加演讲比赛，她准备了一篇大约900字的演讲稿，演讲时间为5分钟，如果要做一个时间为10分钟的演讲，那么大约要准备多少字的演讲稿？
<gadget id="calculator">900 / 5</gadget>
<output>180</output>

<gadget id="calculator">180 * 10</gadget>
<output>1_800</output>

<result>1_800</result>