There used to be some roses in the garden, but 45 were planted this year, and 80 were sold later, and now there are 105. How many roses were there in the garden?
花园里原来有一些月季花，今年栽了45棵，后来又卖了80棵，现在还有105棵，花园里原来有月季花多少棵？
<gadget id="calculator">80 - 45</gadget>
<output>35</output>

<gadget id="calculator">105 + 35</gadget>
<output>140</output>

<result>140</result>