The price of a stroller is 126 yuan. How much does it cost Xingxing Kindergarten to buy 4 such strollers?
一辆童车的价钱是126元．星星幼儿园买回4辆这样的童车，一共要花多少钱？
<gadget id="calculator">4 * 126</gadget>
<output>504</output>

<result>504</result>