Last year, the Supply and Marketing Cooperative received 45 bags of walnuts, 21 bags of chestnuts less than walnuts, and 48 bags more red fruits than chestnuts. How many bags of red fruits did they collect?
去年供销社收核桃45袋，收的板栗比核桃少21袋，收的红果比板栗多48袋，收了多少袋红果？
<gadget id="calculator">45 - 21</gadget>
<output>24</output>

<gadget id="calculator">24 + 48</gadget>
<output>72</output>

<result>72</result>