Fangqiang Farm sold 145 tons of soybeans in the first quarter, 145 tons in the second quarter, and 223 tons in the third quarter. How many tons of soybeans are sold per month on average?
方强农场第一季度卖大豆145吨，第二季度卖大豆145吨，第三季度卖大豆223吨，平均每月卖大豆多少吨？
<gadget id="calculator">145 + 145 + 223</gadget>
<output>513</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">513 / 9</gadget>
<output>57</output>

<result>57</result>