My mother brought 500 yuan and bought me a pair of shoes for 228 yuan and a skirt for 172 yuan. How much money do you have left?
妈妈带了500元钱，给我买了一双鞋花了228元，买一条裙子花了172元．还剩多少元？
<gadget id="calculator">228 + 172</gadget>
<output>400</output>

<gadget id="calculator">500 - 400</gadget>
<output>100</output>

<result>100</result>