The sports store launched a promotional activity, and coach Huang of the football team brought 720 yuan to buy footballs. Buy 1 to 4 for 30 yuan each; buy 5 to 9 for 28 yuan each, and buy more than 10 for 24 yuan each. Please do the math for Coach Huang. How many footballs can he buy with the money he brings?
体育商店开展促销活动，足球队的黄教练带了720元钱去买足球．购1～4个每个30元；购5～9个每个28元，购10个以上每个24元，请你帮黄教练算一算，他带的钱能买多少个足球？
<gadget id="calculator">720 / 24</gadget>
<output>30</output>

<result>30</result>