There is a pile of coal with a total of 477 tons, which is transported by 3 trucks with a load of 3 tons. How many times does each truck need to be transported?
有一堆煤共477吨，由3辆载重3吨的卡车来运，每辆卡车要运多少趟？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">477 / 9</gadget>
<output>53</output>

<result>53</result>