The price of each children's tricycle is 90 yuan, and the kindergarten bought 4, how much did it cost?
儿童三轮车每辆的价格是90元，幼儿园买了4辆，一共用了多少钱？
<gadget id="calculator">90 * 4</gadget>
<output>360</output>

<result>360</result>