A car drives from A to B to deliver goods. It travels 30 kilometers per hour when it goes there, and 40 kilometers per hour when it returns. It takes 8 hours and 45 minutes to go back and forth. Find the distance between A and B.
汽车从甲地开往乙地送货，去时每小时行30千米，返回时每小时40千米，往返一共用8小时45分钟，求甲、乙两地之间的距离．
<gadget id="calculator">8.75 * 40</gadget>
<output>350</output>

<gadget id="calculator">30 + 40</gadget>
<output>70</output>

<gadget id="calculator">350 / 70</gadget>
<output>5</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<result>150</result>