Mom buys back a bag of strawberries. Xiaohong eats half of the bag of strawberries and there are 5 more strawberries. At this time, there are 20 strawberries left. How many strawberries did my mother buy in this bag?
妈妈买回一袋草莓，小红吃了这袋草莓的一半还多5个，这时草莓还剩20个．妈妈买回的这袋草莓原有多少个？
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>