Mr. Zhang went to the sporting goods store to buy 8 basketballs. The price of each basketball was between 30-50 yuan. Mr. Zhang should bring at least how much yuan to ensure enough.
张老师去体育用品店买8个篮球，每个篮球的价格在30-50元之间，张老师至少应带多少元才能保证够用．
<gadget id="calculator">50 * 8</gadget>
<output>400</output>

<result>400</result>