The fourth grade has two classes, the first class has three small teams, and each team does 20 good deeds. The second class also has three small teams, and each team does 18 good deeds. How many good deeds do each team perform on average in these two fourth grade classes?
四年级有两个班，一班三个小队，每队做好事20件，二班也有三个小队，每队做好事18件，四年级这两个班平均每个小队做好事多少件？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">60 + 54</gadget>
<output>114</output>

<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">114 / 6</gadget>
<output>19</output>

<result>19</result>