Dongdong's family eats an average of 30 kilograms of rice per month. How much rice does their family eat in half a year?
冬冬家平均每月吃大米30千克，他们家半年吃大米多少千克？
<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<result>180</result>