Xiao Ming, Xiao Hong, and Xiao Ling donated 73 books to "Hope Primary School". Times. So, how many books did Xiaohong donate?
小明、小红、小玲共向"希望小学"捐赠书籍73本，小玲捐赠书籍的本数比小红多3本，如果小红给小明2本书，小明捐赠书籍的本数就是小红的2倍．那么，小红捐赠了多少本书．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 - 3</gadget>
<output>-1</output>

<gadget id="calculator">4 + 73 + (-1)</gadget>
<output>76</output>

<gadget id="calculator">2 + 1 + 1</gadget>
<output>4</output>

<gadget id="calculator">76 / 4</gadget>
<output>19</output>

<result>19</result>