The younger sister goes from home to school at a speed of 40 meters per minute. After 5 minutes, the older sister chases the younger sister, and finally catches up with the younger sister at a distance of 600 meters from home. What is the speed of the older sister?
妹妹以每分钟40米的速度从家去学校，5分钟后，姐姐去追妹妹，结果在离家600米的地方追上妹妹，姐姐的速度是多少？
<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<gadget id="calculator">600 - 200</gadget>
<output>400</output>

<gadget id="calculator">400 / 40</gadget>
<output>10</output>

<gadget id="calculator">600 / 10</gadget>
<output>60</output>

<result>60</result>