The little goat delivers a letter to the puppy. The distance between the two families is 900 meters. They set off from their respective homes at the same time and walk towards each other. The little goat walks 70 meters in each branch, and the puppy walks 80 meters in each branch. After a few minutes, the little goat can deliver the letter to the puppy. dog? How far is the little goat from his home at this time?
小山羊给小狗送信，两家相距900米，他俩同时从各自家里出发，相向而行，小山羊每分行70米，小狗每分行80米，几分钟后小山羊能把信交给小狗？这时小山羊离自己家有多远？
<gadget id="calculator">70 + 80</gadget>
<output>150</output>

<gadget id="calculator">900 / 150</gadget>
<output>6</output>

<gadget id="calculator">70 * 6</gadget>
<output>420</output>

<result>420</result>