There are 189 soft seats on a train, and the number of hard seats is 4 times that of soft seats. How many seats are there in total on this train?
一列火车上有189个软席座位，硬席座位的数量是软席的4倍，这列火车上一共有多少个座位？
<gadget id="calculator">189 * 4</gadget>
<output>756</output>

<gadget id="calculator">189 + 756</gadget>
<output>945</output>

<result>945</result>