Xiaofang walks 60 meters per minute from her home to the park, and she can reach the park in 15 minutes. If she wants to get to the park 3 minutes earlier, how many meters does she have to walk on average per minute?
小芳从家到公园，每分钟走60米，15分钟可以到达公园．如果想提早3分钟到公园，她平均每分钟要走多少米？
<gadget id="calculator">60 * 15</gadget>
<output>900</output>

<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">900 / 12</gadget>
<output>75</output>

<result>75</result>