The store sold 27 towels in the morning, and twice as many towels in the afternoon. How many towels were sold in the whole day?
商店上午卖出毛巾27条，下午卖出的毛巾是上午的2倍，全天共卖出卖出毛巾多少条？
<gadget id="calculator">27 * 2</gadget>
<output>54</output>

<gadget id="calculator">54 + 27</gadget>
<output>81</output>

<result>81</result>