On average, Guangming Restaurant delivers food 3 times a day, and charges 2 yuan each time. Based on this calculation, how much food delivery fee did Guangming Restaurant earn in February this year?
光明餐厅平均每天送外卖3次，每次收费2元．照这样计算，今年二月份光明餐厅共收入多少送外卖费用？
<gadget id="calculator">3 * 2 * 28</gadget>
<output>168</output>

<result>168</result>