The cafeteria bought 60 cabbages, ate 56, and bought another 30. How many are there now?
食堂买来60棵白菜，吃了56棵，又买来30棵，现在有多少棵？
<gadget id="calculator">60 - 56</gadget>
<output>4</output>

<gadget id="calculator">4 + 30</gadget>
<output>34</output>

<result>34</result>