The canteen shipped 420 kg of flour, and the rice shipped was 120 kg more than the flour. If you eat 9 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9千克，这批大米够吃多少天？
<gadget id="calculator">420 + 120</gadget>
<output>540</output>

<gadget id="calculator">540 / 9</gadget>
<output>60</output>

<result>60</result>