If 7 identical trucks are used to transport goods, 56 tons can be transported per day. If 2 identical trucks are added, how many tons can be transported per day?
用7辆同样的卡车运货，每天可运56吨，如果增加同样的卡车2辆，每天运货多少吨？
<gadget id="calculator">56 / 7</gadget>
<output>8</output>

<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">8 * 9</gadget>
<output>72</output>

<result>72</result>