There are 43 children in the big class and small class of Happy Kindergarten. If each person in the big class gives 7 pieces of candy and each person in the small class gives 5 pieces of candy, there will be an excess of 15 pieces of candy. If each person in the big class is given 10 yuan and each person in the small class is given 7 yuan, there will be 13 children in the small class who will not get any candy. How many children are there in the small class?
快乐幼儿园大班和小班的小朋友共43人．如果大班每人给7块糖，小班每人给5块糖，就多余15块糖．如果大班每人给10块，小班每人给7块，就有13位小班的小朋友分不到糖．问小班有多少位小朋友？
<gadget id="calculator">129 - 106</gadget>
<output>23</output>

<gadget id="calculator">23 / 1</gadget>
<output>23</output>

<result>23</result>