The canteen shipped 420 kg of flour, and the rice shipped was 120 kg more than the flour. If you eat 12 kilograms of rice every day, how many days will this batch of rice be enough to last?
食堂运来面粉420千克，运来的大米比面粉多120千克．如果每天吃掉大米12千克，这批大米够吃多少天？
<gadget id="calculator">420 + 120</gadget>
<output>540</output>

<gadget id="calculator">540 / 12</gadget>
<output>45</output>

<result>45</result>