Xiaodong walks 60 meters per minute from home to school, and arrives at school in 15 minutes. When he comes home from school, he wants to get home 3 minutes earlier than when he went to school. Please help Xiaodong do the math. How many meters should he walk per minute?
小冬从家上学校每分钟走60米，15分钟到校，放学回家时，他想比上学时提前3分钟到家，请你帮小冬算一算，他每分钟应走多少米？
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">15 / 12</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">60 * (5/4)</gadget>
<output>75</output>

<result>75</result>