The cafeteria bought back 100 kilograms of rice and has been eating for 4 days, eating x kilograms of rice every day, how many kilograms of rice are left.
食堂买回100千克的大米，已经吃了4天，每天吃x千克的大米，还剩下多少千克的大米．
<gadget id="calculator">100 - 4</gadget>
<output>96</output>

<result>96</result>