Xiaohong's family put 1,470 kilograms of corn collected this year into bags. First use big bags, each bag contains 50 kilograms, and after filling 24 bags, use small bags, each bag contains 30 kilograms. How many more sachets?
小红家把今年收来的1470千克玉米装入袋子里．先用大袋子装，每袋子装50千克，装了24袋后改用小袋子装，每袋装30千克．还要装多少个小袋？
<gadget id="calculator">50 * 24</gadget>
<output>1_200</output>

<gadget id="calculator">1_470 - 1_200</gadget>
<output>270</output>

<gadget id="calculator">270 / 30</gadget>
<output>9</output>

<result>9</result>