Xiaohong practices writing 5 words every day. From January 1st to January 21st, how many words did she write in total?
小红每天练习写字5个，从1月1日到1月21日，她一共写了多少个字？
<gadget id="calculator">5 * 21</gadget>
<output>105</output>

<result>105</result>