A pile of goods weighs 72 tons, 45 tons have already been transported, and the rest is divided into 9 shipments. How many tons are shipped on average each time?
一堆货物重72吨，已经运走了45吨，剩下的分成9次运完，平均每次运多少吨？
<gadget id="calculator">72 - 45</gadget>
<output>27</output>

<gadget id="calculator">27 / 9</gadget>
<output>3</output>

<result>3</result>