Xiao Pang took 50 yuan to Lianhua Supermarket, bought school supplies and spent 19.37 yuan, and spent 15.63 yuan on snacks. How much money is left?
小胖带了50元钱去联华超市，买学习用品用去了19.37元，零食用去了15.63元，还剩下多少元？
<gadget id="calculator">50 - 19.37 - 15.63</gadget>
<output>15</output>

<result>15</result>