Mom buys a basket of apples. According to the planned number of days, if she eats 5 apples a day, there will be 45 more apples;
妈妈买回一筐苹果，按计划天数，如果每天吃5个，则多出45个；如果每天吃7个，则少9个，问妈妈买了多少个苹果？
<gadget id="calculator">45 + 9</gadget>
<output>54</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<gadget id="calculator">5 * 27</gadget>
<output>135</output>

<gadget id="calculator">135 + 45</gadget>
<output>180</output>

<result>180</result>