Lin Fan writes 5 big characters every minute, from 7:28 to 7:40, how many big characters can Lin Fan write in total?
林凡每分钟写5个大字，从7：28到7：40，林凡一共能写多少个大字？
<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<result>60</result>