The price of a pair of men's leather shoes is 280 yuan, and the price of a pair of men's leather shoes is 10 yuan more than three times that of children's shoes. How much is a pair of children's shoes?
一双男式皮鞋的价格是280元，一双男式皮鞋的价钱比儿童鞋的3倍多10元，一双儿童鞋多少钱？
<gadget id="calculator">280 - 10</gadget>
<output>270</output>

<gadget id="calculator">270 / 3</gadget>
<output>90</output>

<result>90</result>