The store originally had some dumpling flour, and after selling 35 kilograms, there are 40 kilograms left. How many kilograms of dumpling flour does the store have? (solution by equation)
商店原有一些饺子粉，卖出35千克以后，还剩40千克，这个商店原有多少千克饺子粉？(用方程解)
<gadget id="calculator">40 + 35</gadget>
<output>75</output>

<result>75</result>