The price of a children's tricycle is 90 yuan, and the kindergarten bought 4 pairs, how much did it cost in total?
一辆儿童三轮车的价钱是90元，幼儿园买了4俩，一共用了多少元．
<gadget id="calculator">90 * 4</gadget>
<output>360</output>

<result>360</result>