Xiao Hong walks 68 meters per minute, and Xiao Fang walks 72 meters per minute. After 15 minutes, how much more did Xiao Fang walk than Xiao Hong?
小宏每分钟走68米，小方每分钟走72米．15分钟后，小方比小宏多走了多少米？
<gadget id="calculator">72 - 68</gadget>
<output>4</output>

<gadget id="calculator">4 * 15</gadget>
<output>60</output>

<result>60</result>