Xiaoyong's family raised 5 cows. On average, each cow produces 8 kg of milk per day. How many kilograms of milk did these cows produce in total in May?
晓勇家养了5头奶牛．平均每头奶牛每天产奶8千克．这些奶牛五月份全月共产奶多少千克？
<gadget id="calculator">8 * 5 * 30</gadget>
<output>1_200</output>

<result>1_200</result>