The ratio of the amount of coal transported by large carts to small carts is 5:3, and the small carts transported 15 tons. How many tons of coal are there in total?
大车与小车运煤数量的比是5：3，小车运了15吨，这些煤一共多少吨？
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<result>40</result>