The cafeteria bought 100 kilograms of rice and ate 8 kilograms a day for 5 days. How many kilograms are left?
食堂买来100千克大米，吃了5天，每天吃8千克，还剩多少千克？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<result>60</result>